diff --git a/src/builtin_functions.h b/src/builtin_functions.h
index 830e4c7bda4cec9b60ac9eb1e12dbedd9628a6b3..8fc30a5cfe5b6fb0ae3ecc50e03aaea570d5b690 100644
--- a/src/builtin_functions.h
+++ b/src/builtin_functions.h
@@ -2,7 +2,7 @@
 || This file is part of Pike. For copyright information see COPYRIGHT.
 || Pike is distributed under GPL, LGPL and MPL. See the file COPYING
 || for more information.
-|| $Id: builtin_functions.h,v 1.25 2003/06/12 09:25:07 mast Exp $
+|| $Id: builtin_functions.h,v 1.26 2003/07/21 23:34:01 mast Exp $
 */
 
 #ifndef BUILTIN_EFUNS_H
@@ -123,6 +123,9 @@ PMOD_EXPORT void f_backtrace(INT32 args);
 void init_builtin(void);
 void exit_builtin(void);
 
+/* From modules/files */
+void f_werror (INT32 args);
+
 /* Prototypes end here */
 
 #endif