diff --git a/CodeGen/src/OptimizeConstProp.cpp b/CodeGen/src/OptimizeConstProp.cpp
index 9e55eb36..f0855afa 100644
--- a/CodeGen/src/OptimizeConstProp.cpp
+++ b/CodeGen/src/OptimizeConstProp.cpp
@@ -504,6 +504,7 @@ static void handleBuiltinEffects(ConstPropState& state, LuauBuiltinFunction bfid
     case LBF_GETMETATABLE:
     case LBF_TONUMBER:
     case LBF_TOSTRING:
+    case LBF_BIT32_BYTESWAP:
         break;
     case LBF_TABLE_INSERT:
         state.invalidateHeap();