diff --git a/sysdeps/unix/sysv/aix/bits/types.h b/sysdeps/unix/sysv/aix/bits/types.h
index c41b34c1ef..830dcea7b0 100644
--- a/sysdeps/unix/sysv/aix/bits/types.h
+++ b/sysdeps/unix/sysv/aix/bits/types.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,92,94,95,96,97,98,99 Free Software Foundation, Inc.
+/* Copyright (C) 1991,92,94,95,96,97,98,99, 2000 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
@@ -145,4 +145,7 @@ typedef unsigned int __t_uscalar_t;
 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 typedef int __intptr_t;
 
+/* Duplicate info from sys/socket.h.  */
+typedef unsigned int __socklen_t;
+
 #endif /* bits/types.h */
diff --git a/sysdeps/unix/sysv/hpux/bits/types.h b/sysdeps/unix/sysv/hpux/bits/types.h
index 86595e87a8..e95892eda3 100644
--- a/sysdeps/unix/sysv/hpux/bits/types.h
+++ b/sysdeps/unix/sysv/hpux/bits/types.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 92, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1994-1998, 2000 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
@@ -103,7 +103,7 @@ typedef struct
        from the global namespace.  */
 #ifdef __USE_XOPEN
     __fd_mask fds_bits[__FD_SETSIZE / __NFDBITS];
-# define __FDS_BITS(set) ((set)->fds_bits) 
+# define __FDS_BITS(set) ((set)->fds_bits)
 #else
     __fd_mask __fds_bits[__FD_SETSIZE / __NFDBITS];
 # define __FDS_BITS(set) ((set)->__fds_bits)
@@ -144,4 +144,7 @@ typedef unsigned int __t_uscalar_t;
 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 typedef int __intptr_t;
 
+/* Duplicate info from sys/socket.h.  */
+typedef unsigned int __socklen_t;
+
 #endif /* bits/types.h */
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/types.h b/sysdeps/unix/sysv/linux/alpha/bits/types.h
index 8a79621cc6..722db9e230 100644
--- a/sysdeps/unix/sysv/linux/alpha/bits/types.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/types.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,92,94,95,96,97,98,99 Free Software Foundation, Inc.
+/* Copyright (C) 1991,92,94,95,96,97,98,99, 2000 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
@@ -123,6 +123,9 @@ typedef unsigned long int __t_uscalar_t;
 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 typedef long int __intptr_t;
 
+/* Duplicate info from sys/socket.h.  */
+typedef unsigned int __socklen_t;
+
 
 /* Now add the thread types.  */
 #ifdef __USE_UNIX98
diff --git a/sysdeps/unix/sysv/linux/mips/bits/types.h b/sysdeps/unix/sysv/linux/mips/bits/types.h
index 48a9bf07e1..6bb07e7b13 100644
--- a/sysdeps/unix/sysv/linux/mips/bits/types.h
+++ b/sysdeps/unix/sysv/linux/mips/bits/types.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,92,94,95,96,97,98,99 Free Software Foundation, Inc.
+/* Copyright (C) 1991,92,94,95,96,97,98,99, 2000 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
@@ -149,6 +149,9 @@ typedef unsigned long int __t_uscalar_t;
 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 typedef int __intptr_t;
 
+/* Duplicate info from sys/socket.h.  */
+typedef unsigned int __socklen_t;
+
 
 /* Now add the thread types.  */
 #ifdef __USE_UNIX98
diff --git a/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h b/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h
index 1e7b50e780..65ad002f79 100644
--- a/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h
+++ b/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,92,94,95,96,97,98,99 Free Software Foundation, Inc.
+/* Copyright (C) 1991,92,94,95,96,97,98,99, 2000 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
@@ -134,4 +134,7 @@ typedef unsigned int __t_uscalar_t;
 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 typedef long int __intptr_t;
 
+/* Duplicate info from sys/socket.h.  */
+typedef unsigned int __socklen_t;
+
 #endif /* bits/types.h */