diff --git a/twasm/asm/main.asm b/twasm/asm/main.asm
index aec5199..2a0cf2a 100644
--- a/twasm/asm/main.asm
+++ b/twasm/asm/main.asm
@@ -1987,7 +1987,7 @@ print:
     mov al, [rsi]
     cmp al, 0x00
     je .done
-    out dx, al
+    out dx, ax
     inc rsi
     jmp .loop
   .done:
@@ -3050,7 +3050,7 @@ program:
   db "    mov al, [rsi]", 0x0A
   db "    cmp al, 0x00", 0x0A
   db "    je .done", 0x0A
-  db "    out dx, al", 0x0A
+  db "    out dx, ax", 0x0A
   db "    inc rsi", 0x0A
   db "    jmp .loop", 0x0A
   db "  .done:", 0x0A