diff --git a/sonic-radiance.love/birb/utils/datas.lua b/sonic-radiance.love/birb/utils/datas.lua
index ad99d82..8bfdf2c 100644
--- a/sonic-radiance.love/birb/utils/datas.lua
+++ b/sonic-radiance.love/birb/utils/datas.lua
@@ -27,12 +27,12 @@ local DATADIR = "datas"
 local GAMEDATADIR = "gamedata"
 
 function DataUtils.isLuaFile(name)
-  local extension = name:sub(#name - 4, #name)
+  local extension = name:sub(#name - 3, #name)
   return (extension == ".lua")
 end
 
 function DataUtils.luaFileToModule(luaFile)
-  if (not DataUtils.isLuaFile(luaFile)) then
+  if (DataUtils.isLuaFile(luaFile)) then
     return luaFile:sub(1, #luaFile - 4)
   else
     return luaFile