diff --git a/lib/birdlib.h b/lib/birdlib.h
index 22695c19..6f053302 100644
--- a/lib/birdlib.h
+++ b/lib/birdlib.h
@@ -51,7 +51,7 @@ void debug(char *msg, ...);		/* Printf to debug output */
 #if defined(LOCAL_DEBUG) || defined(GLOBAL_DEBUG)
 #define DBG(x, y...) debug(x, ##y)
 #else
-#define DBG(x, y...)
+#define DBG(x, y...) do { } while(0)
 #endif
 
 #ifdef DEBUGGING