diff --git a/ethernet_interface.cpp b/ethernet_interface.cpp
index 74c3a4b..6fc1e2e 100644
--- a/ethernet_interface.cpp
+++ b/ethernet_interface.cpp
@@ -818,7 +818,7 @@
         stream << "MACAddress=" << mac << "\n";
     }
 
-    if (!nICEnabled())
+    if (!EthernetInterfaceIntf::nICEnabled())
     {
         stream << "Unmanaged=yes\n";
     }