diff --git a/mm/slab_common.c b/mm/slab_common.c
index 893d32059915..477fa471da18 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -230,7 +230,7 @@ static struct kmem_cache *create_cache(const char *name,
 	if (args->use_freeptr_offset &&
 	    (args->freeptr_offset >= object_size ||
 	     !(flags & SLAB_TYPESAFE_BY_RCU) ||
-	     !IS_ALIGNED(args->freeptr_offset, sizeof(freeptr_t))))
+	     !IS_ALIGNED(args->freeptr_offset, __alignof__(freeptr_t))))
 		goto out;
 
 	err = -ENOMEM;