diff --git a/mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt b/mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt
index 35c503da..b87e6f9f 100644
--- a/mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt
@@ -43,7 +43,11 @@ data class IpNeighbour(val ip: InetAddress, val dev: String, val lladdr: Long, v
                         .filter { parseNumericAddress(it[ARP_IP_ADDRESS]) == ip && it[ARP_DEVICE] == dev }
                         .map { it[ARP_HW_ADDRESS] }
                         .singleOrNull() ?: "")
-                if (lladdr.isEmpty()) return emptyList()
+                val mac = if (lladdr.isEmpty()) {
+                    if (match.groups[4] == null) return emptyList()
+                    Timber.w(IOException("Failed to find MAC address for $line"))
+                    0
+                } else lladdr.macToLong()
                 val state = if (match.groupValues[1].isNotEmpty()) State.DELETING else
                     when (match.groupValues[7]) {
                         "", "INCOMPLETE" -> State.INCOMPLETE
@@ -52,13 +56,13 @@ data class IpNeighbour(val ip: InetAddress, val dev: String, val lladdr: Long, v
                         "NOARP" -> return emptyList()   // skip
                         else -> throw IllegalArgumentException("Unknown state encountered: ${match.groupValues[7]}")
                     }
-                val result = IpNeighbour(ip, dev, lladdr.macToLong(), state)
+                val result = IpNeighbour(ip, dev, mac, state)
                 val devParser = devFallback.matchEntire(dev)
                 if (devParser != null) try {
                     val index = devParser.groupValues[1].toInt()
                     val iface = NetworkInterface.getByIndex(index)
                     if (iface == null) Timber.w("Failed to find network interface #$index")
-                    else return listOf(IpNeighbour(ip, iface.name, lladdr.macToLong(), state), result)
+                    else return listOf(IpNeighbour(ip, iface.name, mac, state), result)
                 } catch (_: SocketException) { }
                 listOf(result)
             } catch (e: Exception) {