diff --git a/avr/modules/flash/io.asm b/avr/modules/flash/io.asm
index a0fd731..47b0428 100644
--- a/avr/modules/flash/io.asm
+++ b/avr/modules/flash/io.asm
@@ -43,7 +43,7 @@ ioWaitForGivenMsg_loop:
     cpi r16, CPRO_CMD_FLASH_END
     breq ioWaitForGivenMsg_gotIt
 ioWaitForGivenMsg_loopEnd:
-    mov r17, r16                     ; move expected code back to r16
+    mov r16, r17                     ; move expected code back to r16
     dec r20
   brne ioWaitForGivenMsg_loop
   clc