diff --git a/sys/dev/vx/if_vx.c b/sys/dev/vx/if_vx.c
index 6b39f86d5fd8..abefc3c5f6e0 100644
--- a/sys/dev/vx/if_vx.c
+++ b/sys/dev/vx/if_vx.c
@@ -27,6 +27,8 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
+ * $Id$
+ *
  */
 
 /*