diff --git a/clang/lib/Sema/SemaExprObjC.cpp b/clang/lib/Sema/SemaExprObjC.cpp
index 18d9d38eee92f..1514ce4be0658 100644
--- a/clang/lib/Sema/SemaExprObjC.cpp
+++ b/clang/lib/Sema/SemaExprObjC.cpp
@@ -1980,6 +1980,7 @@ ExprResult SemaObjC::HandleExprPropertyRefExpr(
     SourceLocation SuperLoc, QualType SuperType, bool Super) {
   ASTContext &Context = getASTContext();
   const ObjCInterfaceType *IFaceT = OPT->getInterfaceType();
+  assert(IFaceT && "Expected an Interface");
   ObjCInterfaceDecl *IFace = IFaceT->getDecl();
 
   if (!MemberName.isIdentifier()) {