diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 8d7f919d79b..4623257256b 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2000-11-16  Gerald Pfeifer  <pfeifer@dbai.tuwien.ac.at>
+
+	* config/c_io_stdio.h: Include stddef.h.
+
 2000-11-16  Mark Mitchell  <mark@codesourcery.com>
 
 	* config/c_io_stdio.h (streamsize): Make it a typedef for
diff --git a/libstdc++-v3/config/c_io_stdio.h b/libstdc++-v3/config/c_io_stdio.h
index 0d2d26b7cf8..ae2277e83e7 100644
--- a/libstdc++-v3/config/c_io_stdio.h
+++ b/libstdc++-v3/config/c_io_stdio.h
@@ -33,6 +33,7 @@
 #define _CPP_IO_STDIO_H 1
 
 #include <stdio.h>
+#include <stddef.h>
 #include <bits/c++threads.h>
 
 #if _GLIBCPP_USE_WCHAR_T