diff --git a/include/usb_ether.h b/include/usb_ether.h
index 678c9dff252..011ead7a364 100644
--- a/include/usb_ether.h
+++ b/include/usb_ether.h
@@ -40,23 +40,19 @@ struct ueth_data {
 };
 
 /*
- * Function definitions for each USB ethernet driver go here, bracketed by
- * #ifdef CONFIG_USB_ETHER_xxx...#endif
+ * Function definitions for each USB ethernet driver go here
+ * (declaration is unconditional, compilation is conditional)
  */
-#ifdef CONFIG_USB_ETHER_ASIX
 void asix_eth_before_probe(void);
 int asix_eth_probe(struct usb_device *dev, unsigned int ifnum,
 		      struct ueth_data *ss);
 int asix_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 		      struct eth_device *eth);
-#endif
 
-#ifdef CONFIG_USB_ETHER_SMSC95XX
 void smsc95xx_eth_before_probe(void);
 int smsc95xx_eth_probe(struct usb_device *dev, unsigned int ifnum,
 			struct ueth_data *ss);
 int smsc95xx_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 			struct eth_device *eth);
-#endif
 
 #endif /* __USB_ETHER_H__ */