diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 4729779e2..f5c159f42 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2005-08-22  Corinna Vinschen  <corinna@vinschen.de>
+
+	* mtinfo.h (mtinfo_drive::error): Fix argument bug in debug_printf call.
+
 2005-08-20  Christopher Faylor  <cgf@timesys.com>
 
 	* cygerrno.h (geterrno_from_win_error): Change declaration to default
diff --git a/winsup/cygwin/mtinfo.h b/winsup/cygwin/mtinfo.h
index dd78c7f24..66e74cc33 100644
--- a/winsup/cygwin/mtinfo.h
+++ b/winsup/cygwin/mtinfo.h
@@ -84,7 +84,7 @@ class mtinfo_drive
   inline int error (const char *str)
     {
       if (lasterr)
-	debug_printf ("%s: Win32 error %d", lasterr);
+	debug_printf ("%s: Win32 error %d", str, lasterr);
       return lasterr;
     }
   inline bool get_feature (DWORD parm)