diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 018af2a12d9..e965442e707 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,4 +1,9 @@
-2001-06-09  Alexandre Oliva  <aoliva@redhat.com>, Stephen L Moshier  <moshier@mediaone.net>
+2001-06-10  Benjamin Kosnik  <bkoz@redhat.com>
+
+	* include/c_std/bits/std_cstdio.h: Include cstddef for size_t.
+
+2001-06-09  Alexandre Oliva  <aoliva@redhat.com> 
+	    Stephen L Moshier  <moshier@mediaone.net>
 
 	* acinclude.m4 (AC_EXEEXT): Work around in case it expands to
 	nothing, as in autoconf 2.50.
diff --git a/libstdc++-v3/include/c_std/bits/std_cstdio.h b/libstdc++-v3/include/c_std/bits/std_cstdio.h
index 08392245444..6e28031f96d 100644
--- a/libstdc++-v3/include/c_std/bits/std_cstdio.h
+++ b/libstdc++-v3/include/c_std/bits/std_cstdio.h
@@ -34,6 +34,8 @@
 #ifndef _CPP_CSTDIO
 #define _CPP_CSTDIO 1
 
+#include <bits/std_cstddef.h>
+
 #pragma GCC system_header
 #include_next <stdio.h>