diff --git a/AssetStudio/ImportHelper.cs b/AssetStudio/ImportHelper.cs
index c45b623..23282b4 100644
--- a/AssetStudio/ImportHelper.cs
+++ b/AssetStudio/ImportHelper.cs
@@ -245,7 +245,7 @@ namespace AssetStudio
 
         public static FileReader DecryptEnsembleStar(FileReader reader)
         {
-            if (Path.GetExtension(reader.FileName) == ".z")
+            if (Path.GetExtension(reader.FileName) != ".z")
             {
                 return reader;
             }