diff --git a/usr/local/sbin/ovpn-linkup b/usr/local/sbin/ovpn-linkup
index 613822ccbb..b613a9a845 100755
--- a/usr/local/sbin/ovpn-linkup
+++ b/usr/local/sbin/ovpn-linkup
@@ -2,10 +2,10 @@
 
 # let the configuration system know that the ip has changed.
 #/usr/local/sbin/pfSctl -c "interface newip $interface"
-if [ -n $route_vpn_gateway ]; then
+if [ "" != "$route_vpn_gateway" ]; then
 	/bin/echo $route_vpn_gateway > /tmp/$1_router
 else
-	/bin/echo $4 > /tmp/$1_router
+	/bin/echo $5 > /tmp/$1_router
 fi
 /usr/bin/touch /tmp/$1up
 # reload filter