diff --git a/sys/net/if_vxlan.c b/sys/net/if_vxlan.c
--- a/sys/net/if_vxlan.c
+++ b/sys/net/if_vxlan.c
@@ -2533,7 +2533,7 @@
 
 	ifp = sc->vxl_ifp;
 	srcaddr = sc->vxl_src_addr.in4.sin_addr;
-	srcport = vxlan_pick_source_port(sc, m);
+	srcport = htons(vxlan_pick_source_port(sc, m));
 	dstaddr = fvxlsa->in4.sin_addr;
 	dstport = fvxlsa->in4.sin_port;
 
@@ -2644,7 +2644,7 @@
 
 	ifp = sc->vxl_ifp;
 	srcaddr = &sc->vxl_src_addr.in6.sin6_addr;
-	srcport = vxlan_pick_source_port(sc, m);
+	srcport = htons(vxlan_pick_source_port(sc, m));
 	dstaddr = &fvxlsa->in6.sin6_addr;
 	dstport = fvxlsa->in6.sin6_port;