diff --git a/headers/cpp/iostdio.h b/headers/cpp/iostdio.h
index 9ed47a4654..5ead4cb51b 100644
--- a/headers/cpp/iostdio.h
+++ b/headers/cpp/iostdio.h
@@ -1,4 +1,4 @@
-/* 
+/*
 Copyright (C) 1993 Free Software Foundation
 
 This file is part of the GNU IO Library.  This library is free
@@ -39,7 +39,7 @@ typedef _IO_FILE FILE;
 #define EOF (-1)
 #endif
 #ifndef BUFSIZ
-#define BUFSIZ 1024
+#define BUFSIZ 8192
 #endif
 
 /* #define size_t, fpos_t L_tmpname TMP_MAX */
diff --git a/headers/posix/stdio.h b/headers/posix/stdio.h
index f140dbbd82..cfdf670953 100644
--- a/headers/posix/stdio.h
+++ b/headers/posix/stdio.h
@@ -14,7 +14,7 @@
  * __gnuc_va_list */
 
 
-#define BUFSIZ			1024
+#define BUFSIZ			8192
 #define _IOFBF			0		/* fully buffered */
 #define _IOLBF			1		/* line buffered */
 #define _IONBF			2		/* not buffered */