diff --git a/clang/lib/CodeGen/CGExprConstant.cpp b/clang/lib/CodeGen/CGExprConstant.cpp
index caa327c..c8dd236 100644
--- a/clang/lib/CodeGen/CGExprConstant.cpp
+++ b/clang/lib/CodeGen/CGExprConstant.cpp
@@ -476,7 +476,7 @@
   for (RecordDecl::field_iterator Field = RD->field_begin(),
        FieldEnd = RD->field_end(); Field != FieldEnd; ++Field, ++FieldNo) {
     // If this is a union, skip all the fields that aren't being initialized.
-    if (RD->isUnion() && Val.getUnionField() != *Field)
+    if (RD->isUnion() && !declaresSameEntity(Val.getUnionField(), *Field))
       continue;
 
     // Don't emit anonymous bitfields, they just affect layout.