diff --git a/grub-core/kern/mips/cache_flush.S b/grub-core/kern/mips/cache_flush.S
index 11096c035..a352fd8ba 100644
--- a/grub-core/kern/mips/cache_flush.S
+++ b/grub-core/kern/mips/cache_flush.S
@@ -9,15 +9,15 @@
 	subu $t1, $t3, $t2
 1:
 	cache 1, 0($t0)
-	addiu $t1, $t1, 0xffff
+	addiu $t1, $t1, -0x4
 	bne $t1, $zero, 1b
-	 addiu $t0, $t0, 0x1
+	 addiu $t0, $t0, 0x4
 	sync
 	move $t0, $t2
 	subu $t1, $t3, $t2
 2:
 	cache 0, 0($t0)
-	addiu $t1, $t1, 0xffff
+	addiu $t1, $t1, -0x4
 	bne $t1, $zero, 2b
-	 addiu $t0, $t0, 0x1
+	 addiu $t0, $t0, 0x4
 	sync