diff --git a/Add-Sleep-Mode.md b/Add-Sleep-Mode.md
index dcf316a..6c87d17 100644
--- a/Add-Sleep-Mode.md
+++ b/Add-Sleep-Mode.md
@@ -37,7 +37,7 @@ static void ReadKeys(void)
 +        IeBak = REG_IE;               // IE save
 +        REG_IE = INTR_FLAG_KEYPAD;    // Enable Key interrupt
 +        REG_IME = 1;
-+        asm("swi 0X03");              // This is the Stop command
++        asm("swi #3" : : : "r2", "r12", "memory");              // This is the Stop command;
 +        REG_IME = 0;
 +        REG_IE = IeBak;               // IE return
 +        REG_IME = 1;