diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 63c7bdd..4800886 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -551,7 +551,7 @@
   unsigned NumProtoArgs = Proto ? Proto->getNumArgs() : 0;
   Expr** Args = TheCall->getArgs();
   unsigned NumArgs = TheCall->getNumArgs();
-  if (isa<CXXOperatorCallExpr>(TheCall) && isa<CXXMethodDecl>(FDecl)) {
+  if (IsMemberOperatorCall) {
     // If this is a call to a member operator, hide the first argument
     // from checkCall.
     // FIXME: Our choice of AST representation here is less than ideal.