diff --git a/gameupdate/patch.bat b/gameupdate/patch.bat
index 9dfc27c..45c1376 100644
--- a/gameupdate/patch.bat
+++ b/gameupdate/patch.bat
@@ -79,8 +79,8 @@ if exist "%ROOT_DIR%\data.dts" (
     if exist "%UNPACKER%" (
         echo [Pre-Setup] Running SRPG_Unpacker preparation steps...
 
-        REM Step 1: Unpack (once)
-        if not exist "%ROOT_DIR%\data\" (
+    REM Step 1: Unpack (once)
+    if not exist "%ROOT_DIR%\data\" if exist "%ROOT_DIR%\data\project.dat" (
             if exist "%ROOT_DIR%\data.dts" (
                 echo [Pre-Setup] Step 1: Unpacking data.dts to data
                 pushd "%ROOT_DIR%"