diff --git a/headers/private/kernel/lock.h b/headers/private/kernel/lock.h
index 3ca3640618..770c3cb895 100644
--- a/headers/private/kernel/lock.h
+++ b/headers/private/kernel/lock.h
@@ -99,7 +99,7 @@ typedef struct rw_lock {
 #	define RECURSIVE_LOCK_INITIALIZER(name)	{ MUTEX_INITIALIZER(name), 0 }
 #else
 #	define MUTEX_INITIALIZER(name) \
-	{ name, NULL, B_SPINLOCK_INITIALIZER, 0, 0, 0 }
+	{ name, NULL, B_SPINLOCK_INITIALIZER, 0, 0 }
 #	define RECURSIVE_LOCK_INITIALIZER(name)	{ MUTEX_INITIALIZER(name), -1, 0 }
 #endif