diff --git a/mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt b/mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt
index 1f9d31c2..ac36b12e 100644
--- a/mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt
@@ -118,7 +118,7 @@ class Routing(private val caller: Any, private val downstream: String,
     }
 
     private val hostAddress = try {
-        val iface = NetworkInterface.getByName(downstream)!!
+        val iface = NetworkInterface.getByName(downstream) ?: error("iface not found")
         ifaceHandler(iface)
         val addresses = iface.interfaceAddresses!!.filter { it.address is Inet4Address }
         if (addresses.size > 1) error("More than one addresses was found: $addresses")