diff --git a/core/utils/envs.py b/core/utils/envs.py
index f70db966ae750a0c61e776aac6b6c8a3331081cd..36993a93a9ea1f83f1cd24fc80a1b9623b61b445 100755
--- a/core/utils/envs.py
+++ b/core/utils/envs.py
@@ -98,7 +98,7 @@ def set_global_envs(envs):
 
     if get_platform() != "LINUX":
         for dataset in envs["dataset"]:
-            name = ".".join("dataset", dataset["name"], "type")
+            name = ".".join(["dataset", dataset["name"], "type"])
             global_envs[name] = "DataLoader"