diff --git a/bits/in.h b/bits/in.h
index a510382245..a688719ca5 100644
--- a/bits/in.h
+++ b/bits/in.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 2000, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -22,12 +22,6 @@
 # error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
 #endif
 
-/* Link numbers.  */
-#define	IMPLINK_IP		155
-#define	IMPLINK_LOWEXPER	156
-#define	IMPLINK_HIGHEXPER	158
-
-
 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
    The first word in the comment at the right is the data type used;
    "bool" means a boolean value stored in an `int'.  */
diff --git a/conform/data/netinet/in.h-data b/conform/data/netinet/in.h-data
index 1f1955d1a6..607f97c48a 100644
--- a/conform/data/netinet/in.h-data
+++ b/conform/data/netinet/in.h-data
@@ -83,7 +83,6 @@ macro IN6_IS_ADDR_MC_SITELOCAL
 macro IN6_IS_ADDR_MC_ORGLOCAL
 macro IN6_IS_ADDR_MC_GLOBAL
 
-allow IMPLINK_*
 allow IN_*
 allow IP_*
 allow IPPORT_*
diff --git a/sysdeps/generic/bits/in.h b/sysdeps/generic/bits/in.h
index a510382245..a688719ca5 100644
--- a/sysdeps/generic/bits/in.h
+++ b/sysdeps/generic/bits/in.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 2000, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -22,12 +22,6 @@
 # error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
 #endif
 
-/* Link numbers.  */
-#define	IMPLINK_IP		155
-#define	IMPLINK_LOWEXPER	156
-#define	IMPLINK_HIGHEXPER	158
-
-
 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
    The first word in the comment at the right is the data type used;
    "bool" means a boolean value stored in an `int'.  */