diff --git a/include/config.h.w32 b/include/config.h.w32
index 6e0f6bcf1..f8be38b5e 100644
--- a/include/config.h.w32
+++ b/include/config.h.w32
@@ -57,6 +57,10 @@ static const char *const rcsid[] = { (const char *)rcsid, "@(#)" msg }
 #define MAXPATHLEN MaxPathLen
 #endif
 
+#if _MSC_VER < 1900
+# define __func__ __FUNCTION__
+#endif
+
 #ifdef BUILD_KRB5_LIB
 #ifndef KRB5_LIB
 #ifdef _WIN32