diff --git a/plug.py b/plug.py
index 3f1a175a..c51342c9 100644
--- a/plug.py
+++ b/plug.py
@@ -371,8 +371,7 @@ def show_error(err):
     :param err:
     .. versionadded:: 2.3.7
     """
-
-    if config.shutting_down:
+    if config.shutting_down():
         logger.info(f'Called during shutdown: "{str(err)}"')
         return