1 files changed, 2 insertions, 0 deletions
diff --git a/src/passes/I64ToI32Lowering.cpp b/src/passes/I64ToI32Lowering.cpp
index 0b476bb15..a9ac2da82 100644
--- a/src/passes/I64ToI32Lowering.cpp
+++ b/src/passes/I64ToI32Lowering.cpp
@@ -27,6 +27,7 @@
 #include "emscripten-optimizer/istring.h"
 #include "support/name.h"
 #include "wasm-builder.h"
+#include "ir/names.h"
 
 
 namespace wasm {
@@ -140,6 +141,7 @@ struct I64ToI32Lowering : public WalkerPass<PostWalker<I64ToI32Lowering>> {
     func->localNames.clear();
     func->localIndices.clear();
     Index newIdx = 0;
+    Names::ensureNames(&oldFunc);
     for (Index i = 0; i < oldFunc.getNumLocals(); ++i) {
       assert(oldFunc.hasLocalName(i));
       Name lowName = oldFunc.getLocalName(i);