diff --git a/net/net.c b/net/net.c
index 3578118..8416861 100644
--- a/net/net.c
+++ b/net/net.c
@@ -136,7 +136,8 @@
 	if (!var)
 		return 0;
 
-	string_to_ip(var, &ip);
+	if (string_to_ip(var, &ip))
+		return 0;
 
 	return ip;
 }