diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 9c4208f..37dab28 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -1051,13 +1051,13 @@
 
 	rds_ib_incoming_slab = kmem_cache_create("rds_ib_incoming",
 					sizeof(struct rds_ib_incoming),
-					0, 0, NULL);
+					0, SLAB_HWCACHE_ALIGN, NULL);
 	if (!rds_ib_incoming_slab)
 		goto out;
 
 	rds_ib_frag_slab = kmem_cache_create("rds_ib_frag",
 					sizeof(struct rds_page_frag),
-					0, 0, NULL);
+					0, SLAB_HWCACHE_ALIGN, NULL);
 	if (!rds_ib_frag_slab)
 		kmem_cache_destroy(rds_ib_incoming_slab);
 	else