diff --git a/lab1_v2.S b/lab1_v2.S
index 9803ca9..36be02c 100644
--- a/lab1_v2.S
+++ b/lab1_v2.S
@@ -3,8 +3,8 @@
 .thumb
 
 .macro BKPT_WRITE addr_src
-    mov r0, 0x4
     mov r1, \addr_src
+    mov r0, 0x4
     bkpt 0xAB
 .endm