diff --git a/src/passes/SafeHeap.cpp b/src/passes/SafeHeap.cpp
index d5a4f8843de..6b30fde4987 100644
--- a/src/passes/SafeHeap.cpp
+++ b/src/passes/SafeHeap.cpp
@@ -223,8 +223,8 @@ struct SafeHeap : public Pass {
   }
 
   bool
-  isPossibleAtomicOperation(Index align, Index bytes, bool shared, Type type) {
-    return align == bytes && shared && type.isInteger();
+  isPossibleAtomicOperation(Index align, Index bytes, bool /*shared*/, Type type) {
+    return align == bytes && type.isInteger();
   }
 
   void addGlobals(Module* module, FeatureSet features) {