diff --git a/redirector.py b/redirector.py
index d37f8e5..dbd977d 100644
--- a/redirector.py
+++ b/redirector.py
@@ -202,10 +202,12 @@ def generate_policy_script(cfg, ips):
         )
 
         for ip in ips:
-            if cfg["gateway"]:
+            if cfg["gateway"] and not cfg["interface"]:
                 f.write(f'ip route replace {ip} via {cfg["gateway"]} table {cfg["table"]}\n')
-            else:
+            elif cfg["interface"] and not cfg["gateway"]:
                 f.write(f'ip route replace {ip} dev {cfg["interface"]} table {cfg["table"]}\n')
+            else:
+                f.write(f'ip route replace {ip} via {cfg["gateway"]} dev {cfg["interface"]} table {cfg["table"]}\n')
 
 
 def generate_blackhole_script(cfg, ips):