diff --git a/src/network/kernel/qnetworkinterface_unix.cpp b/src/network/kernel/qnetworkinterface_unix.cpp
index 8f290e51073..c28c5ea9e61 100644
--- a/src/network/kernel/qnetworkinterface_unix.cpp
+++ b/src/network/kernel/qnetworkinterface_unix.cpp
@@ -464,8 +464,10 @@ static QNetworkInterface::InterfaceType probeIfType(int socket, int iftype, stru
         case IFM_ETHER:
             return QNetworkInterface::Ethernet;
 
+#ifdef IFM_FDDI
         case IFM_FDDI:
             return QNetworkInterface::Fddi;
+#endif
 
         case IFM_IEEE80211:
             return QNetworkInterface::Ieee80211;