diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
index ed2abb2..cd477eb 100644
--- a/drivers/md/raid6main.c
+++ b/drivers/md/raid6main.c
@@ -366,7 +366,8 @@
 	while (drop_one_stripe(conf))
 		;
 
-	kmem_cache_destroy(conf->slab_cache);
+	if (conf->slab_cache)
+		kmem_cache_destroy(conf->slab_cache);
 	conf->slab_cache = NULL;
 }