diff --git a/fipstest.cpp b/fipstest.cpp
index 08d752e7..604ef69f 100644
--- a/fipstest.cpp
+++ b/fipstest.cpp
@@ -21,7 +21,11 @@
 #else
 #define _CRT_DEBUGGER_HOOK __crt_debugger_hook
 #endif
+#if _MSC_VER < 1900
 extern "C" {_CRTIMP void __cdecl _CRT_DEBUGGER_HOOK(int);}
+#else
+extern "C" {void __cdecl _CRT_DEBUGGER_HOOK(int); }
+#endif
 #endif
 #endif