diff --git a/clang/test/SemaCXX/overloaded-operator.cpp b/clang/test/SemaCXX/overloaded-operator.cpp
index cc3f3158d003..cf8af68b571e 100644
--- a/clang/test/SemaCXX/overloaded-operator.cpp
+++ b/clang/test/SemaCXX/overloaded-operator.cpp
@@ -141,10 +141,12 @@ typedef float& Func2(int, double);
 struct ConvertToFunc {
   operator Func1*(); // expected-note{{conversion candidate of type 'int &(*)(float, double)'}}
   operator Func2&(); // expected-note{{conversion candidate of type 'float &(&)(int, double)'}}
+  void operator()();
 };
 
 void test_funcptr_call(ConvertToFunc ctf) {
   int &i1 = ctf(1.0f, 2.0);
   float &f2 = ctf((short int)1, 1.0f);
   ctf((long int)17, 2.0); // expected-error{{error: call to object of type 'struct ConvertToFunc' is ambiguous; candidates are:}}
+  ctf();
 }