diff --git a/ChangeLog b/ChangeLog
index 604a427c6..d8c4bf764 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-10-30  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* util/grub-fstest.c (cmd_cp): Clarify error message.
+	(cmd_cmp): Likewise.
+
 2011-10-30  Yves Blusseau  <blusseau@zetam.org>
 
 	* po/POTFILES.in: Regenerate because of the removal of afs, afs_be, befs
diff --git a/util/grub-fstest.c b/util/grub-fstest.c
index 60889d05e..996d71c3a 100644
--- a/util/grub-fstest.c
+++ b/util/grub-fstest.c
@@ -182,7 +182,8 @@ cmd_cp (char *src, char *dest)
   ff = fopen (dest, "wb");
   if (ff == NULL)
     {
-      grub_util_error (_("open error"));
+      grub_util_error (_("OS file %s open error: %s"), dest,
+		       strerror (errno));
       return;
     }
   read_file (src, cp_hook);
@@ -241,7 +242,8 @@ cmd_cmp (char *src, char *dest)
   ff = fopen (dest, "rb");
   if (ff == NULL)
     {
-      grub_util_error (_("open error"));
+      grub_util_error (_("OS file %s open error: %s"), dest,
+		       strerror (errno));
       return;
     }