diff --git a/src/network/kernel/qnetworkinterface_unix.cpp b/src/network/kernel/qnetworkinterface_unix.cpp
index eb73a2fb180..8ae36b56c22 100644
--- a/src/network/kernel/qnetworkinterface_unix.cpp
+++ b/src/network/kernel/qnetworkinterface_unix.cpp
@@ -352,6 +352,9 @@ static QList<QNetworkInterfacePrivate *> createInterfaces(ifaddrs *rawList)
             if (seenIndexes.contains(ifindex))
                 continue;
 
+            seenInterfaces.insert(name);
+            seenIndexes.append(ifindex);
+
             QNetworkInterfacePrivate *iface = new QNetworkInterfacePrivate;
             interfaces << iface;
             iface->name = name;