Index: cfe/trunk/lib/Sema/SemaCast.cpp
===================================================================
--- cfe/trunk/lib/Sema/SemaCast.cpp
+++ cfe/trunk/lib/Sema/SemaCast.cpp
@@ -1397,6 +1397,8 @@
     msg = diag::err_bad_static_cast_member_pointer_nonmp;
     return TC_NotApplicable;
   }
+  if (Self.Context.getTargetInfo().getCXXABI().isMicrosoft())
+    Self.RequireCompleteType(OpRange.getBegin(), SrcType, 0);
 
   // T == T, modulo cv
   if (!Self.Context.hasSameUnqualifiedType(SrcMemPtr->getPointeeType(),
Index: cfe/trunk/test/CodeGenCXX/microsoft-abi-member-pointers.cpp
===================================================================
--- cfe/trunk/test/CodeGenCXX/microsoft-abi-member-pointers.cpp
+++ cfe/trunk/test/CodeGenCXX/microsoft-abi-member-pointers.cpp
@@ -729,3 +729,20 @@
 // CHECK: @"\01??_9C@pr23878@@$BA@AE" to i8*), i32 0, i32 4
 DMemPtrTy get_memptr() { return &D::f; }
 }
+
+class C {};
+
+typedef void (C::*f)();
+
+class CA : public C {
+public:
+  void OnHelp(void);
+  int OnHelp(int);
+};
+
+// CHECK-LABEL: foo_fun
+void foo_fun() {
+  // CHECK: store i8* bitcast (void (%class.CA*)* @"\01?OnHelp@CA@@QAEXXZ" to i8*), i8**
+  f func = (f)&CA::OnHelp;
+}
+