diff --git a/src/backend/storage/lmgr/lock.c b/src/backend/storage/lmgr/lock.c
index f4f32e9..0e5e679 100644
--- a/src/backend/storage/lmgr/lock.c
+++ b/src/backend/storage/lmgr/lock.c
@@ -331,8 +331,8 @@ PROCLOCK_PRINT(const char *where, const PROCLOCK *proclockP)
 }
 #else							/* not LOCK_DEBUG */
 
-#define LOCK_PRINT(where, lock, type)
-#define PROCLOCK_PRINT(where, proclockP)
+#define LOCK_PRINT(where, lock, type)	(void)0
+#define PROCLOCK_PRINT(where, proclockP)	(void)0
 #endif   /* not LOCK_DEBUG */