diff --git a/birb/core/datas.lua b/birb/core/datas.lua
index b1b008e..324e748 100644
--- a/birb/core/datas.lua
+++ b/birb/core/datas.lua
@@ -36,9 +36,11 @@ end
 
 function DataManager:loadDatas()
     self.datapacks = {}
-    for key, datas in pairs(index.datapacks) do
-        self.core.debug:debug("datamanager", "loading data for " .. key)
-        self.datapacks[key] = DataPack(datas[1], datas[2], datas[3], datas[4], datas[5])
+    if (index.datapack ~= nil) then
+        for key, datas in pairs(index.datapacks) do
+            self.core.debug:debug("datamanager", "loading data for " .. key)
+            self.datapacks[key] = DataPack(datas[1], datas[2], datas[3], datas[4], datas[5])
+        end
     end
 end