diff --git a/corrlib/tools.py b/corrlib/tools.py
index 118b094..26cbf0a 100644
--- a/corrlib/tools.py
+++ b/corrlib/tools.py
@@ -88,7 +88,7 @@ def set_config(path: str, section: str, option: str, value: Any) -> None:
     value: Any
         The value we set the option to.
     """
-    config_path = os.path.join(path, '.corrlib')
+    config_path = os.path.join(path, CONFIG_FILENAME)
     config = ConfigParser()
     if os.path.exists(config_path):
         config.read(config_path)