diff --git a/kernel/mips64/zsum.S b/kernel/mips64/zsum.S
index 129b97900..fb0eeef9c 100644
--- a/kernel/mips64/zsum.S
+++ b/kernel/mips64/zsum.S
@@ -192,8 +192,8 @@
 	MOV	t2, a2
 	daddu	X, X, INCX
 
-	ADD	s1, s1, t1
 	bgtz	I, .L26
+	ADD	s1, s1, t1
 	ADD	s2, s2, t2
 	.align 3