diff --git a/src/mapleall/mpl2mpl/src/reflection_analysis.cpp b/src/mapleall/mpl2mpl/src/reflection_analysis.cpp
index 4a65fa8c35de1c09bb774b90c66ff9759454ecd7..753921fed8466d8f1d25bb35d55469c3428eb0e2 100755
--- a/src/mapleall/mpl2mpl/src/reflection_analysis.cpp
+++ b/src/mapleall/mpl2mpl/src/reflection_analysis.cpp
@@ -1546,7 +1546,7 @@ void ReflectionAnalysis::GenClassMetaData(Klass &klass) {
   }
   if (structType->IsMIRClassType()) {
     MIRClassType *classType = static_cast<MIRClassType*>(structType);
-    for (TyIdx const kTyIdx : classType->GetInterfaceImplemented()) {
+    for (TyIdx const& kTyIdx : classType->GetInterfaceImplemented()) {
       Klass *interface = klassH->GetKlassFromTyIdx(kTyIdx);
       if (interface == nullptr) {
         MIRType *type = GlobalTables::GetTypeTable().GetTypeFromTyIdx(kTyIdx);