diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c0d1ee4..878bdc07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,12 @@ Script-breaking changes
 
 * `is` is (pun intended) now a reserved keyword to prepare for possible future type checking expressions (e.g. `x is "string"`).
 
+Breaking changes
+----------------
+
+* `LogicPackage` is removed from `CorePackage`.
+* Bit-field functions are moved into a new `BitFieldPackage` (used to be in `LogicPackage`) which makes more sense.
+
 New features
 ------------
 
diff --git a/src/packages/bit_field.rs b/src/packages/bit_field.rs
new file mode 100644
index 00000000..57155f68
--- /dev/null
+++ b/src/packages/bit_field.rs
@@ -0,0 +1,198 @@
+#![allow(non_snake_case)]
+
+use crate::plugin::*;
+use crate::{def_package, ExclusiveRange, InclusiveRange, Position, RhaiResultOf, ERR, INT};
+#[cfg(feature = "no_std")]
+use std::prelude::v1::*;
+
+def_package! {
+    /// Package of basic bit-field utilities.
+    crate::BitFieldPackage => |lib| {
+        lib.standard = true;
+
+        combine_with_exported_module!(lib, "bit_field", bit_field_functions);
+    }
+}
+
+#[export_module]
+mod bit_field_functions {
+    const BITS: usize = std::mem::size_of::<INT>() * 8;
+
+    #[rhai_fn(return_raw)]
+    pub fn get_bit(value: INT, index: INT) -> RhaiResultOf<bool> {
+        if index >= 0 {
+            let offset = index as usize;
+
+            if offset >= BITS {
+                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
+            } else {
+                Ok((value & (1 << offset)) != 0)
+            }
+        } else if let Some(abs_index) = index.checked_abs() {
+            let offset = abs_index as usize;
+
+            // Count from end if negative
+            if offset > BITS {
+                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
+            } else {
+                Ok((value & (1 << (BITS - offset))) != 0)
+            }
+        } else {
+            Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
+        }
+    }
+    #[rhai_fn(return_raw)]
+    pub fn set_bit(value: &mut INT, index: INT, new_value: bool) -> RhaiResultOf<()> {
+        if index >= 0 {
+            let offset = index as usize;
+
+            if offset >= BITS {
+                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
+            } else {
+                let mask = 1 << offset;
+                if new_value {
+                    *value |= mask;
+                } else {
+                    *value &= !mask;
+                }
+                Ok(())
+            }
+        } else if let Some(abs_index) = index.checked_abs() {
+            let offset = abs_index as usize;
+
+            // Count from end if negative
+            if offset > BITS {
+                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
+            } else {
+                let mask = 1 << offset;
+                if new_value {
+                    *value |= mask;
+                } else {
+                    *value &= !mask;
+                }
+                Ok(())
+            }
+        } else {
+            Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
+        }
+    }
+    #[rhai_fn(name = "get_bits", return_raw)]
+    pub fn get_bits_range(value: INT, range: ExclusiveRange) -> RhaiResultOf<INT> {
+        let from = INT::max(range.start, 0);
+        let to = INT::max(range.end, from);
+        get_bits(value, from, to - from)
+    }
+    #[rhai_fn(name = "get_bits", return_raw)]
+    pub fn get_bits_range_inclusive(value: INT, range: InclusiveRange) -> RhaiResultOf<INT> {
+        let from = INT::max(*range.start(), 0);
+        let to = INT::max(*range.end(), from - 1);
+        get_bits(value, from, to - from + 1)
+    }
+    #[rhai_fn(return_raw)]
+    pub fn get_bits(value: INT, index: INT, bits: INT) -> RhaiResultOf<INT> {
+        if bits < 1 {
+            return Ok(0);
+        }
+
+        let offset = if index >= 0 {
+            let offset = index as usize;
+
+            if offset >= BITS {
+                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
+            }
+
+            offset
+        } else if let Some(abs_index) = index.checked_abs() {
+            let offset = abs_index as usize;
+
+            // Count from end if negative
+            if offset > BITS {
+                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
+            }
+            BITS - offset
+        } else {
+            return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
+        };
+
+        let bits = if offset + bits as usize > BITS {
+            BITS - offset
+        } else {
+            bits as usize
+        };
+
+        let mut base = 1;
+        let mut mask = 0;
+
+        for _ in 0..bits {
+            mask |= base;
+            base <<= 1;
+        }
+
+        Ok(((value & (mask << index)) >> index) & mask)
+    }
+    #[rhai_fn(name = "set_bits", return_raw)]
+    pub fn set_bits_range(
+        value: &mut INT,
+        range: ExclusiveRange,
+        new_value: INT,
+    ) -> RhaiResultOf<()> {
+        let from = INT::max(range.start, 0);
+        let to = INT::max(range.end, from);
+        set_bits(value, from, to - from, new_value)
+    }
+    #[rhai_fn(name = "set_bits", return_raw)]
+    pub fn set_bits_range_inclusive(
+        value: &mut INT,
+        range: InclusiveRange,
+        new_value: INT,
+    ) -> RhaiResultOf<()> {
+        let from = INT::max(*range.start(), 0);
+        let to = INT::max(*range.end(), from - 1);
+        set_bits(value, from, to - from + 1, new_value)
+    }
+    #[rhai_fn(return_raw)]
+    pub fn set_bits(value: &mut INT, index: INT, bits: INT, new_value: INT) -> RhaiResultOf<()> {
+        if bits < 1 {
+            return Ok(());
+        }
+
+        let offset = if index >= 0 {
+            let offset = index as usize;
+
+            if offset >= BITS {
+                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
+            }
+
+            offset
+        } else if let Some(abs_index) = index.checked_abs() {
+            let offset = abs_index as usize;
+
+            // Count from end if negative
+            if offset > BITS {
+                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
+            }
+            BITS - offset
+        } else {
+            return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
+        };
+
+        let bits = if offset + bits as usize > BITS {
+            BITS - offset
+        } else {
+            bits as usize
+        };
+
+        let mut base = 1;
+        let mut mask = 0;
+
+        for _ in 0..bits {
+            mask |= base;
+            base <<= 1;
+        }
+
+        *value &= !(mask << index);
+        *value |= (new_value & mask) << index;
+
+        Ok(())
+    }
+}
diff --git a/src/packages/lang_core.rs b/src/packages/lang_core.rs
index 400b1332..a84b6628 100644
--- a/src/packages/lang_core.rs
+++ b/src/packages/lang_core.rs
@@ -16,6 +16,10 @@ def_package! {
 
 #[export_module]
 mod core_functions {
+    #[rhai_fn(name = "!")]
+    pub fn not(x: bool) -> bool {
+        !x
+    }
     #[rhai_fn(name = "tag", get = "tag", pure)]
     pub fn get_tag(value: &mut Dynamic) -> INT {
         value.tag() as INT
diff --git a/src/packages/logic.rs b/src/packages/logic.rs
index fb87a5f9..860adcda 100644
--- a/src/packages/logic.rs
+++ b/src/packages/logic.rs
@@ -1,7 +1,7 @@
 #![allow(non_snake_case)]
 
 use crate::plugin::*;
-use crate::{def_package, ExclusiveRange, InclusiveRange, RhaiResultOf, ERR, INT};
+use crate::{def_package, INT};
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
 
@@ -61,19 +61,9 @@ def_package! {
             reg_functions!(lib += float; f64);
             combine_with_exported_module!(lib, "f64", f64_functions);
         }
-
-        set_exported_fn!(lib, "!", not);
-
-        combine_with_exported_module!(lib, "bit_field", bit_field_functions);
     }
 }
 
-// Logic operators
-#[export_fn]
-fn not(x: bool) -> bool {
-    !x
-}
-
 #[cfg(not(feature = "only_i32"))]
 #[cfg(not(feature = "only_i64"))]
 gen_cmp_functions!(numbers => i8, u8, i16, u16, i32, u32, u64);
@@ -196,186 +186,3 @@ mod f64_functions {
         (x as f64) <= (y as f64)
     }
 }
-
-#[export_module]
-mod bit_field_functions {
-    const BITS: usize = std::mem::size_of::<INT>() * 8;
-
-    #[rhai_fn(return_raw)]
-    pub fn get_bit(value: INT, index: INT) -> RhaiResultOf<bool> {
-        if index >= 0 {
-            let offset = index as usize;
-
-            if offset >= BITS {
-                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
-            } else {
-                Ok((value & (1 << offset)) != 0)
-            }
-        } else if let Some(abs_index) = index.checked_abs() {
-            let offset = abs_index as usize;
-
-            // Count from end if negative
-            if offset > BITS {
-                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
-            } else {
-                Ok((value & (1 << (BITS - offset))) != 0)
-            }
-        } else {
-            Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
-        }
-    }
-    #[rhai_fn(return_raw)]
-    pub fn set_bit(value: &mut INT, index: INT, new_value: bool) -> RhaiResultOf<()> {
-        if index >= 0 {
-            let offset = index as usize;
-
-            if offset >= BITS {
-                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
-            } else {
-                let mask = 1 << offset;
-                if new_value {
-                    *value |= mask;
-                } else {
-                    *value &= !mask;
-                }
-                Ok(())
-            }
-        } else if let Some(abs_index) = index.checked_abs() {
-            let offset = abs_index as usize;
-
-            // Count from end if negative
-            if offset > BITS {
-                Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
-            } else {
-                let mask = 1 << offset;
-                if new_value {
-                    *value |= mask;
-                } else {
-                    *value &= !mask;
-                }
-                Ok(())
-            }
-        } else {
-            Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into())
-        }
-    }
-    #[rhai_fn(name = "get_bits", return_raw)]
-    pub fn get_bits_range(value: INT, range: ExclusiveRange) -> RhaiResultOf<INT> {
-        let from = INT::max(range.start, 0);
-        let to = INT::max(range.end, from);
-        get_bits(value, from, to - from)
-    }
-    #[rhai_fn(name = "get_bits", return_raw)]
-    pub fn get_bits_range_inclusive(value: INT, range: InclusiveRange) -> RhaiResultOf<INT> {
-        let from = INT::max(*range.start(), 0);
-        let to = INT::max(*range.end(), from - 1);
-        get_bits(value, from, to - from + 1)
-    }
-    #[rhai_fn(return_raw)]
-    pub fn get_bits(value: INT, index: INT, bits: INT) -> RhaiResultOf<INT> {
-        if bits < 1 {
-            return Ok(0);
-        }
-
-        let offset = if index >= 0 {
-            let offset = index as usize;
-
-            if offset >= BITS {
-                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
-            }
-
-            offset
-        } else if let Some(abs_index) = index.checked_abs() {
-            let offset = abs_index as usize;
-
-            // Count from end if negative
-            if offset > BITS {
-                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
-            }
-            BITS - offset
-        } else {
-            return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
-        };
-
-        let bits = if offset + bits as usize > BITS {
-            BITS - offset
-        } else {
-            bits as usize
-        };
-
-        let mut base = 1;
-        let mut mask = 0;
-
-        for _ in 0..bits {
-            mask |= base;
-            base <<= 1;
-        }
-
-        Ok(((value & (mask << index)) >> index) & mask)
-    }
-    #[rhai_fn(name = "set_bits", return_raw)]
-    pub fn set_bits_range(
-        value: &mut INT,
-        range: ExclusiveRange,
-        new_value: INT,
-    ) -> RhaiResultOf<()> {
-        let from = INT::max(range.start, 0);
-        let to = INT::max(range.end, from);
-        set_bits(value, from, to - from, new_value)
-    }
-    #[rhai_fn(name = "set_bits", return_raw)]
-    pub fn set_bits_range_inclusive(
-        value: &mut INT,
-        range: InclusiveRange,
-        new_value: INT,
-    ) -> RhaiResultOf<()> {
-        let from = INT::max(*range.start(), 0);
-        let to = INT::max(*range.end(), from - 1);
-        set_bits(value, from, to - from + 1, new_value)
-    }
-    #[rhai_fn(return_raw)]
-    pub fn set_bits(value: &mut INT, index: INT, bits: INT, new_value: INT) -> RhaiResultOf<()> {
-        if bits < 1 {
-            return Ok(());
-        }
-
-        let offset = if index >= 0 {
-            let offset = index as usize;
-
-            if offset >= BITS {
-                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
-            }
-
-            offset
-        } else if let Some(abs_index) = index.checked_abs() {
-            let offset = abs_index as usize;
-
-            // Count from end if negative
-            if offset > BITS {
-                return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
-            }
-            BITS - offset
-        } else {
-            return Err(ERR::ErrorBitFieldBounds(BITS, index, Position::NONE).into());
-        };
-
-        let bits = if offset + bits as usize > BITS {
-            BITS - offset
-        } else {
-            bits as usize
-        };
-
-        let mut base = 1;
-        let mut mask = 0;
-
-        for _ in 0..bits {
-            mask |= base;
-            base <<= 1;
-        }
-
-        *value &= !(mask << index);
-        *value |= (new_value & mask) << index;
-
-        Ok(())
-    }
-}
diff --git a/src/packages/mod.rs b/src/packages/mod.rs
index 7f73e774..0b8bc6f3 100644
--- a/src/packages/mod.rs
+++ b/src/packages/mod.rs
@@ -4,6 +4,7 @@ use crate::{Module, Shared};
 
 pub(crate) mod arithmetic;
 pub(crate) mod array_basic;
+mod bit_field;
 pub(crate) mod blob_basic;
 mod fn_basic;
 mod iter_basic;
@@ -20,6 +21,7 @@ mod time_basic;
 pub use arithmetic::ArithmeticPackage;
 #[cfg(not(feature = "no_index"))]
 pub use array_basic::BasicArrayPackage;
+pub use bit_field::BitFieldPackage;
 #[cfg(not(feature = "no_index"))]
 pub use blob_basic::BasicBlobPackage;
 pub use fn_basic::BasicFnPackage;
diff --git a/src/packages/pkg_core.rs b/src/packages/pkg_core.rs
index dc106dee..c006b0a1 100644
--- a/src/packages/pkg_core.rs
+++ b/src/packages/pkg_core.rs
@@ -10,7 +10,6 @@ def_package! {
     ///
     /// * [`LanguageCorePackage`][super::LanguageCorePackage]
     /// * [`ArithmeticPackage`][super::ArithmeticPackage]
-    /// * [`LogicPackage`][super::LogicPackage]
     /// * [`BasicStringPackage`][super::BasicStringPackage]
     /// * [`BasicIteratorPackage`][super::BasicIteratorPackage]
     /// * [`BasicFnPackage`][super::BasicFnPackage]
@@ -19,7 +18,6 @@ def_package! {
 
         super::LanguageCorePackage::init(lib);
         super::ArithmeticPackage::init(lib);
-        super::LogicPackage::init(lib);
         super::BasicStringPackage::init(lib);
         super::BasicIteratorPackage::init(lib);
         super::BasicFnPackage::init(lib);
diff --git a/src/packages/pkg_std.rs b/src/packages/pkg_std.rs
index 012aa7d8..b388b379 100644
--- a/src/packages/pkg_std.rs
+++ b/src/packages/pkg_std.rs
@@ -9,6 +9,8 @@ def_package! {
     /// # Contents
     ///
     /// * [`CorePackage`][super::CorePackage]
+    /// * [`BitFieldPackage`][super::BitFieldPackage]
+    /// * [`LogicPackage`][super::LogicPackage]
     /// * [`BasicMathPackage`][super::BasicMathPackage]
     /// * [`BasicArrayPackage`][super::BasicArrayPackage]
     /// * [`BasicBlobPackage`][super::BasicBlobPackage]
@@ -19,6 +21,8 @@ def_package! {
         lib.standard = true;
 
         super::CorePackage::init(lib);
+        super::BitFieldPackage::init(lib);
+        super::LogicPackage::init(lib);
         super::BasicMathPackage::init(lib);
         #[cfg(not(feature = "no_index"))]
         super::BasicArrayPackage::init(lib);