diff --git a/crates/compiler/gen_wasm/src/code_builder.rs b/crates/compiler/gen_wasm/src/code_builder.rs
index 4a0d03613a2..ecec4ad2b0a 100644
--- a/crates/compiler/gen_wasm/src/code_builder.rs
+++ b/crates/compiler/gen_wasm/src/code_builder.rs
@@ -75,7 +75,7 @@ pub struct CodeBuilder<'a> {
     import_relocations: Vec<'a, (usize, u32)>,
 
     /// Keep track of which local variables have been set
-    set_locals: BitVec<u64>,
+    set_locals: BitVec<u32>,
 }
 
 #[allow(clippy::new_without_default)]