diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh
index 6034a091..9d22ec1c 100755
--- a/modules.d/40network/net-lib.sh
+++ b/modules.d/40network/net-lib.sh
@@ -121,7 +121,7 @@ setup_net() {
         route_to_var "$_p" || continue
         [ -n "$route_dev" ] && [ "$route_dev" != "$netif" ] && continue
         ip route add "$route_mask" ${route_gw:+via "$route_gw"} ${route_dev:+dev "$route_dev"}
-        if strstr ":" "$route_mask"; then
+        if strstr "$route_mask" ":"; then
             printf -- "%s\n" "$route_mask ${route_gw:+via $route_gw} ${route_dev:+dev $route_dev}" \
                 > /tmp/net.route6."$netif"
         else