diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index aec90bd..b1a87a8 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -2597,7 +2597,7 @@
     if (const ComplexType *CT = dyn_cast<ComplexType>(T))
       T = CT->getElementType().getTypePtr();
     if (const EnumType *ET = dyn_cast<EnumType>(T))
-      T = ET->getDecl()->getIntegerType().getTypePtr();
+      T = C.getCanonicalType(ET->getDecl()->getIntegerType()).getTypePtr();
 
     const BuiltinType *BT = cast<BuiltinType>(T);
     assert(BT->isInteger());