diff --git a/ChangeLog b/ChangeLog
index dd5d28063..299d51b4d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-10-25  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/commands/gptsync.c (lba_to_chs): Use proper types rather
+	than int.
+
 2013-10-25  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* conf/Makefile.common (CPPFLAGS_KERNEL): Add -DGRUB_KERNEL=1.
diff --git a/grub-core/commands/gptsync.c b/grub-core/commands/gptsync.c
index 1a203dc59..3db62887b 100644
--- a/grub-core/commands/gptsync.c
+++ b/grub-core/commands/gptsync.c
@@ -37,11 +37,11 @@ GRUB_MOD_LICENSE ("GPLv3+");
    Is it a problem?
 */
 static void
-lba_to_chs (int lba, grub_uint8_t *cl, grub_uint8_t *ch,
+lba_to_chs (grub_uint32_t lba, grub_uint8_t *cl, grub_uint8_t *ch,
 	    grub_uint8_t *dh)
 {
-  int cylinder, head, sector;
-  int sectors = 63, heads = 255, cylinders = 1024;
+  grub_uint32_t cylinder, head, sector;
+  grub_uint32_t sectors = 63, heads = 255, cylinders = 1024;
 
   sector = lba % sectors + 1;
   head = (lba / sectors) % heads;