diff --git a/grub-core/bus/usb/ehci.c b/grub-core/bus/usb/ehci.c
index 9abebc6bd..2db07c7c0 100644
--- a/grub-core/bus/usb/ehci.c
+++ b/grub-core/bus/usb/ehci.c
@@ -218,7 +218,7 @@ enum
 
 #define GRUB_EHCI_TERMINATE      (1<<0)
 
-#define GRUB_EHCI_TOGGLE         (1<<31)
+#define GRUB_EHCI_TOGGLE         ((grub_uint32_t) 1<<31)
 
 enum
 {