diff --git a/ethernet_interface.cpp b/ethernet_interface.cpp
index 82f6ae3..f4f8d57 100644
--- a/ethernet_interface.cpp
+++ b/ethernet_interface.cpp
@@ -768,7 +768,12 @@
         MacAddressIntf::mACAddress(value);
 
         auto interface = interfaceName();
-        execute("/sbin/fw_setenv", "fw_setenv", "ethaddr", value.c_str());
+        auto envVar = interfaceToUbootEthAddr(interface.c_str());
+        if (envVar)
+        {
+            execute("/sbin/fw_setenv", "fw_setenv", envVar->c_str(),
+                    value.c_str());
+        }
         // TODO: would remove the call below and
         //      just restart systemd-netwokd
         //      through https://github.com/systemd/systemd/issues/6696