diff --git a/README.md b/README.md
index e3022e1d..114746db 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,6 @@ Rhai's current feature set:
 * Easy-to-use language based on JS+Rust
 * Support for overloaded functions
 * No additional dependencies
-* No unsafe code
 
 **Note:** Currently, the version is 0.9.1, so the language and APIs may change before they stabilize.*
 
diff --git a/src/engine.rs b/src/engine.rs
index 41c217f0..4bff3753 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -780,8 +780,8 @@ impl Engine {
         engine.register_type_name::<u32>("u32");
         engine.register_type_name::<i64>("integer");
         engine.register_type_name::<u64>("u64");
-        engine.register_type_name::<u64>("usize");
-        engine.register_type_name::<f32>("f64");
+        engine.register_type_name::<usize>("usize");
+        engine.register_type_name::<f32>("f32");
         engine.register_type_name::<f64>("float");
         engine.register_type_name::<String>("string");
         engine.register_type_name::<char>("char");