diff --git a/sys/dev/et/if_et.c b/sys/dev/et/if_et.c
index e53a6153fed..695c6baeb91 100644
--- a/sys/dev/et/if_et.c
+++ b/sys/dev/et/if_et.c
@@ -32,9 +32,11 @@
  * SUCH DAMAGE.
  *
  * $DragonFly: src/sys/dev/netif/et/if_et.c,v 1.10 2008/05/18 07:47:14 sephe Exp $
- * $FreeBSD$
  */
 
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/endian.h>