diff --git a/sys/netinet/ip_ftp_pxy.c b/sys/netinet/ip_ftp_pxy.c
index dd70c812401..7e37d967537 100644
--- a/sys/netinet/ip_ftp_pxy.c
+++ b/sys/netinet/ip_ftp_pxy.c
@@ -1,6 +1,8 @@
 /*
  * Simple FTP transparent proxy for in-kernel use.  For use with the NAT
  * code.
+ *
+ * $Id$
  */
 
 #define	isdigit(x)	((x) >= '0' && (x) <= '9')
diff --git a/sys/netinet/ipl.h b/sys/netinet/ipl.h
index d92ec79542f..d1608d54ecb 100644
--- a/sys/netinet/ipl.h
+++ b/sys/netinet/ipl.h
@@ -6,6 +6,7 @@
  * to the original author and the contributors.
  *
  * @(#)ipl.h	1.21 6/5/96
+ * $Id$
  */
 
 #ifndef	__IPL_H__
diff --git a/sys/netinet/mlf_ipl.c b/sys/netinet/mlf_ipl.c
index 55f0ab2aaa4..39249a5d1de 100644
--- a/sys/netinet/mlf_ipl.c
+++ b/sys/netinet/mlf_ipl.c
@@ -4,6 +4,8 @@
  * Redistribution and use in source and binary forms are permitted
  * provided that this notice is preserved and due credit is given
  * to the original author and the contributors.
+ *
+ * $Id$
  */
 /*
  * 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate