diff --git a/src/ast.rs b/src/ast.rs
index 4a82fb67..614ab18e 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -866,7 +866,7 @@ pub struct FnCallInfo {
     /// and the function names are predictable, so no need to allocate a new `String`.
     pub name: Cow<'static, str>,
     /// Namespace of the function, if any.
-    pub namespace: Option<Box<ModuleRef>>,
+    pub namespace: Option<ModuleRef>,
     /// Call native functions only? Set to `true` to skip searching for script-defined function overrides
     /// when it is certain that the function must be native (e.g. an operator).
     pub native_only: bool,
@@ -904,7 +904,7 @@ pub enum Expr {
     /// FnPtr constant.
     FnPointer(Box<IdentX>),
     /// Variable access - ((variable name, position), optional modules, hash, optional index)
-    Variable(Box<(Ident, Option<Box<ModuleRef>>, u64, Option<NonZeroUsize>)>),
+    Variable(Box<(Ident, Option<ModuleRef>, u64, Option<NonZeroUsize>)>),
     /// Property access.
     Property(Box<(IdentX, (String, String))>),
     /// { stmt }
diff --git a/src/engine.rs b/src/engine.rs
index b08164ba..3e9f12cc 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -589,7 +589,7 @@ fn default_print(_s: &str) {
 pub fn search_imports<'s>(
     mods: &'s Imports,
     state: &mut State,
-    modules: &Box<ModuleRef>,
+    modules: &ModuleRef,
 ) -> Result<&'s Module, Box<EvalAltResult>> {
     let (root, root_pos) = &modules[0];
 
@@ -617,7 +617,7 @@ pub fn search_imports<'s>(
 pub fn search_imports_mut<'s>(
     mods: &'s mut Imports,
     state: &mut State,
-    modules: &Box<ModuleRef>,
+    modules: &ModuleRef,
 ) -> Result<&'s mut Module, Box<EvalAltResult>> {
     let (root, root_pos) = &modules[0];
 
diff --git a/src/fn_call.rs b/src/fn_call.rs
index 78c381a3..0ae48900 100644
--- a/src/fn_call.rs
+++ b/src/fn_call.rs
@@ -1094,7 +1094,7 @@ impl Engine {
         state: &mut State,
         lib: &[&Module],
         this_ptr: &mut Option<&mut Dynamic>,
-        modules: &Option<Box<ModuleRef>>,
+        modules: &Option<ModuleRef>,
         name: &str,
         args_expr: impl AsRef<[Expr]>,
         def_val: Option<bool>,
diff --git a/src/parser.rs b/src/parser.rs
index ebdbe625..6aae8d77 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -265,7 +265,7 @@ fn parse_fn_call(
     lib: &mut FunctionsLib,
     id: String,
     capture: bool,
-    mut namespace: Option<Box<ModuleRef>>,
+    mut namespace: Option<ModuleRef>,
     settings: ParseSettings,
 ) -> Result<Expr, ParseError> {
     let (token, token_pos) = input.peek().unwrap();
@@ -898,7 +898,7 @@ fn parse_primary(
                     } else {
                         let mut m: ModuleRef = Default::default();
                         m.push((name, pos));
-                        modules = Some(Box::new(m));
+                        modules = Some(m);
                     }
 
                     Expr::Variable(Box::new((Ident::new(id2, pos2), modules, 0, index)))