diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 930d17f..b4a29bc 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -993,7 +993,7 @@
 	struct netlink_sock *nlk = nlk_sk(sk);
 	struct sockaddr_nl *nladdr = (struct sockaddr_nl *)addr;
 	int err = 0;
-	long unsigned int groups = nladdr->nl_groups;
+	unsigned long groups = nladdr->nl_groups;
 	bool bound;
 
 	if (addr_len < sizeof(struct sockaddr_nl))
@@ -1011,9 +1011,7 @@
 			return err;
 	}
 
-	if (nlk->ngroups == 0)
-		groups = 0;
-	else if (nlk->ngroups < 8*sizeof(groups))
+	if (nlk->ngroups < BITS_PER_LONG)
 		groups &= (1UL << nlk->ngroups) - 1;
 
 	bound = nlk->bound;