diff --git a/ChangeLog b/ChangeLog
index 6e9ab5758..3a695b25a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-02-12  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/partmap/msdos.c (pc_partition_map_embed): Fix off by one
+	error.
+
 2011-02-11  Colin Watson  <cjwatson@ubuntu.com>
 
 	* util/grub.d/20_linux_xen.in: Bail out early if linux_list is
diff --git a/grub-core/partmap/msdos.c b/grub-core/partmap/msdos.c
index d411c4405..31a0a0707 100644
--- a/grub-core/partmap/msdos.c
+++ b/grub-core/partmap/msdos.c
@@ -232,10 +232,10 @@ pc_partition_map_embed (struct grub_disk *disk, unsigned int *nsectors,
 	break;
     }
 
-  if (end >= *nsectors + 1)
+  if (end >= *nsectors + 2)
     {
       unsigned i;
-      *nsectors = end - 1;
+      *nsectors = end - 2;
       *sectors = grub_malloc (*nsectors * sizeof (**sectors));
       if (!*sectors)
 	return grub_errno;