diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index 5588c7a..f60a475 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -157,8 +157,7 @@
 		pr_debug("setting timeout of conntrack %p to 0\n", sibling);
 		sibling->proto.gre.timeout	  = 0;
 		sibling->proto.gre.stream_timeout = 0;
-		if (del_timer(&sibling->timeout))
-			sibling->timeout.function((unsigned long)sibling);
+		nf_ct_kill(sibling);
 		nf_ct_put(sibling);
 		return 1;
 	} else {