diff --git a/headers/private/kernel/stdio.h b/headers/private/kernel/stdio.h
index 15f23427a3..247ef567ae 100755
--- a/headers/private/kernel/stdio.h
+++ b/headers/private/kernel/stdio.h
@@ -9,10 +9,13 @@
 #include <stdarg.h>
 
 #ifdef __cplusplus
-extern "C"
-{
+extern "C" {
 #endif
 
+#define L_ctermid  		32
+#define L_cuserid  		32
+#define	L_tmpnam		512
+
 typedef off_t fpos_t;  /* stdio file position type */
 
 /* stdio buffers */