diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index af3f7aa73e13a007d06fd528d8c8d101d2553087..ee1f88419cb0640d38203eb3a16c7b03094f7c56 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -472,11 +472,15 @@ int dlm_init_master_caches(void)
 
 void dlm_destroy_master_caches(void)
 {
-	if (dlm_lockname_cache)
+	if (dlm_lockname_cache) {
 		kmem_cache_destroy(dlm_lockname_cache);
+		dlm_lockname_cache = NULL;
+	}
 
-	if (dlm_lockres_cache)
+	if (dlm_lockres_cache) {
 		kmem_cache_destroy(dlm_lockres_cache);
+		dlm_lockres_cache = NULL;
+	}
 }
 
 static void dlm_lockres_release(struct kref *kref)