diff --git a/net/bridge/br.c b/net/bridge/br.c
index fb57ab6b24f9ef8feea780179ad2e8284a9e532f..02c24cf63c344a3b15bcf87369da7f847150fab3 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -190,6 +190,8 @@ static int __init br_init(void)
 {
 	int err;
 
+	BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
+
 	err = stp_proto_register(&br_stp_proto);
 	if (err < 0) {
 		pr_err("bridge: can't register sap for STP\n");