diff --git a/LR35902/LR35902.cs b/LR35902/LR35902.cs
index 8ea3ff9..3de84a6 100644
--- a/LR35902/LR35902.cs
+++ b/LR35902/LR35902.cs
@@ -226,7 +226,8 @@ namespace LR35902
             }
             else if (this.HALT.Lowered())
             {
-                //this.Execute(0);  // NOP
+                _ = this.FetchByte();
+                this.Execute(0);  // NOP
             }
             else
             {