diff --git a/ChangeLog b/ChangeLog
index d4468e1c9..a13f0353e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2009-04-17  Pavel Roskin  <proski@gnu.org>
 
+	* bus/usb/usbtrans.c (grub_usb_control_msg): Warning fix.
+
 	* loader/multiboot_loader.c (grub_cmd_multiboot_loader): Fix
 	return without a value.  Fix inconsistent indentation.
 
diff --git a/bus/usb/usbtrans.c b/bus/usb/usbtrans.c
index 8b2d5ad01..fd8295741 100644
--- a/bus/usb/usbtrans.c
+++ b/bus/usb/usbtrans.c
@@ -36,7 +36,7 @@ grub_usb_control_msg (grub_usb_device_t dev,
   int datablocks;
   struct grub_usb_packet_setup setupdata;
   grub_usb_err_t err;
-  int max;
+  unsigned int max;
 
   grub_dprintf ("usb",
 		"control: reqtype=0x%02x req=0x%02x val=0x%02x idx=0x%02x size=%d\n",