diff --git a/netgraph7/ng_fec.c b/netgraph7/ng_fec.c
--- a/netgraph7/ng_fec.c
+++ b/netgraph7/ng_fec.c
@@ -1053,7 +1053,7 @@
 		break;
 #ifdef INET6
 	case M_FEC_INET6:
-		port = (ip6->ip6_dst.s6_addr[15] ^
+		port = (ip6->ip6_src.s6_addr[15] ^
 		    ip6->ip6_dst.s6_addr[15]) & mask;
 		break;
 #endif