diff --git a/sys/netipx/ipx_ip.c b/sys/netipx/ipx_ip.c
index 4f5721f00fef..7abd9da50fbc 100644
--- a/sys/netipx/ipx_ip.c
+++ b/sys/netipx/ipx_ip.c
@@ -241,7 +241,7 @@ ipxip_input(m, hlen)
 static int
 ipxipoutput(ifp, m, dst, rt)
 	struct ifnet *ifp;
-	register struct mbuf *m;
+	struct mbuf *m;
 	struct sockaddr *dst;
 	struct rtentry *rt;
 {