diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index fc66c8a..01ce07b 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -246,7 +246,7 @@ static __inline__ int icmp_xmit_lock(void)
 	return 0;
 }
 
-static void icmp_xmit_unlock(void)
+static __inline__ void icmp_xmit_unlock(void)
 {
 	spin_unlock_bh(&icmp_sock->sk_lock.slock);
 }