--- Gnu-Mach/device/if_hdr.h	2020/09/02 04:36:57	1.1.1.1
+++ Gnu-Mach/device/if_hdr.h	2020/09/02 04:43:01	1.1.1.2
@@ -147,4 +147,4 @@ struct ifnet {
 
 #define	IFNET_SLOWHZ	1		/* granularity is 1 second */
 
-#endif	_IF_HDR_
+#endif	/* _IF_HDR_ */