diff --git a/sys/netinet/cc/cc.c b/sys/netinet/cc/cc.c
--- a/sys/netinet/cc/cc.c
+++ b/sys/netinet/cc/cc.c
@@ -501,6 +501,8 @@
 		}
 		CCV(ccv, snd_cwnd) = mss;
 		break;
+	default:
+		break;
 	}
 }