diff --git a/lock.c b/lock.c
index 9bcfb6ec..0c1a65ed 100644
--- a/lock.c
+++ b/lock.c
@@ -288,7 +288,7 @@ void uwsgi_rwunlock_fast(struct uwsgi_lock_item *uli) { uwsgi_unlock_fast(uli);
 #define uwsgi_rwunlock_fast uwsgi_rwunlock_ipcsem
 
 #define UWSGI_LOCK_SIZE sizeof(int)
-#define UWSGI_RWLOCK_SIZE (sizeof(int)
+#define UWSGI_RWLOCK_SIZE sizeof(int)
 
 #define UWSGI_LOCK_ENGINE_NAME "ipcsem"