diff --git a/pk3DS/Subforms/Gen6/OPower.cs b/pk3DS/Subforms/Gen6/OPower.cs
index 68c10db..6b7d9e4 100644
--- a/pk3DS/Subforms/Gen6/OPower.cs
+++ b/pk3DS/Subforms/Gen6/OPower.cs
@@ -105,8 +105,7 @@ private void setEntry()
             powerData[entry][0x4] = otherCost;
             powerData[entry][0xE] = stage;
             powerData[entry][0xF] = lvlup;
-
-            Array.Copy(powerData[entry], 0x12, BitConverter.GetBytes(efficacy), 0, 2);
+            BitConverter.GetBytes(efficacy).CopyTo(powerData[entry], 0x12);
             powerData[entry][0x14] = duration; // sbyte FF = -1 (no duration?)
 
             byte usability = (byte)NUD_Usability.Value;
@@ -125,4 +124,4 @@ private void formClosing(object sender, FormClosingEventArgs e)
                 File.WriteAllBytes(codebin, exefsData);
         }
     }
-}
\ No newline at end of file
+}