diff --git a/linux-core/drm_fence.c b/linux-core/drm_fence.c
index be075bb3..6be6f218 100644
--- a/linux-core/drm_fence.c
+++ b/linux-core/drm_fence.c
@@ -495,7 +495,7 @@ void drm_fence_manager_init(drm_device_t * dev)
 	int i;
 
 
-	fm->lock = RW_LOCK_UNLOCKED;
+	rwlock_init(&fm->lock);
 	write_lock(&fm->lock);
 	fm->initialized = 0;
 	if (!fed)