diff --git a/utils/extconf.c b/utils/extconf.c
index 8245a161f1..3c2d695247 100644
--- a/utils/extconf.c
+++ b/utils/extconf.c
@@ -153,6 +153,7 @@ void ast_console_puts(const char *string);
 #define LOG_DTMF    __LOG_DTMF, _A_
 
 /* lock.h */
+#define _ASTERISK_LOCK_H /* A small indication that this is horribly wrong. */
 
 #ifndef	HAVE_MTX_PROFILE
 #define	__MTX_PROF(a)	return pthread_mutex_lock((a))