diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index d6fe37f..064de02 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -320,6 +320,10 @@
 #define GENERIC_IMAGE_TYPE_EXT(Type, Id, Ext) \
     setOpenCLExtensionForType(Context.Id, Ext);
 #include "clang/Basic/OpenCLImageTypes.def"
+#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
+    addImplicitTypedef(#ExtType, Context.Id##Ty); \
+    setOpenCLExtensionForType(Context.Id##Ty, #Ext);
+#include "clang/Basic/OpenCLExtensionTypes.def"
     };
 
   if (Context.getTargetInfo().hasBuiltinMSVaList()) {