diff --git a/src/class/net/net_device.h b/src/class/net/net_device.h
index 133689deb..399916355 100644
--- a/src/class/net/net_device.h
+++ b/src/class/net/net_device.h
@@ -94,7 +94,7 @@ void tud_network_init_cb(void);
 
 // client must provide this: 48-bit MAC address
 // TODO removed later since it is not part of tinyusb stack
-extern const uint8_t tud_network_mac_address[6];
+extern uint8_t tud_network_mac_address[6];
 
 //------------- NCM -------------//