diff --git a/src/thread/mips/syscall_cp.s b/src/thread/mips/syscall_cp.s
index 8dd4c442198b31814f2986c9f311260467a2592a..b6f30ee8849f60007354d99b574e0ca250f4344b 100644
--- a/src/thread/mips/syscall_cp.s
+++ b/src/thread/mips/syscall_cp.s
@@ -7,17 +7,20 @@ __syscall_cp_asm:
 __cp_begin:
 	lw      $4, 0($4)
 	bne     $4, $0, 2f
-	move    $25, $5
+	move    $2, $5
 	move    $4, $6
 	move    $5, $7
 	lw      $6, 16($sp)
 	lw      $7, 20($sp)
 	lw      $8, 24($sp)
 	lw      $9, 28($sp)
+	lw      $10,32($sp)
 	subu    $sp, $sp, 32
 	sw      $8, 16($sp)
 	sw      $9, 20($sp)
-	move    $2, $25
+	sw      $10,24($sp)
+	sw      $2, 28($sp)
+	lw      $2, 28($sp)
 	syscall
 .global __cp_end
 __cp_end: