diff --git a/PKHeX.Core/Saves/SAV2Stadium.cs b/PKHeX.Core/Saves/SAV2Stadium.cs
index 09820ea59..95ec8b045 100644
--- a/PKHeX.Core/Saves/SAV2Stadium.cs
+++ b/PKHeX.Core/Saves/SAV2Stadium.cs
@@ -176,7 +176,7 @@ namespace PKHeX.Core
 
         public static bool IsStadium(byte[] data)
         {
-            if (data.Length != SaveUtil.SIZE_G1STAD)
+            if (data.Length != SaveUtil.SIZE_G2STAD)
                 return false;
             return StadiumUtil.IsMagicPresentEither(data, TeamSize, MAGIC_FOOTER);
         }