diff --git a/crispy_forms/bootstrap.py b/crispy_forms/bootstrap.py
index 0f81b9a1..b73e99af 100644
--- a/crispy_forms/bootstrap.py
+++ b/crispy_forms/bootstrap.py
@@ -269,7 +269,7 @@ def __init__(
             active=active,
             css_class=css_class,
             wrapper_class=wrapper_class,
-            prepended_class = prepended_class
+            prepended_class = prepended_class,
             template=template,
             **kwargs,
         )