diff --git a/base/inc/TError.h b/base/inc/TError.h
index bdd86003a76301aff47c666c11b4f8ce343cb16f..5083637f2fb99c8136c6008a2ec7eb8c1f686fca 100644
--- a/base/inc/TError.h
+++ b/base/inc/TError.h
@@ -1,4 +1,4 @@
-// @(#)root/base:$Name:  $:$Id: TError.h,v 1.9 2006/11/16 10:15:14 rdm Exp $
+// @(#)root/base:$Name:  $:$Id: TError.h,v 1.10 2007/02/01 14:20:21 brun Exp $
 // Author: Fons Rademakers   29/07/95
 
 /*************************************************************************
@@ -29,6 +29,8 @@
 #ifndef ROOT_Rtypes
 #include "Rtypes.h"
 #endif
+#include <stdarg.h>
+
 
 class TVirtualMutex;