diff --git a/cms/envs/common.py b/cms/envs/common.py
index 75971f7803..36f0fe26a0 100644
--- a/cms/envs/common.py
+++ b/cms/envs/common.py
@@ -165,7 +165,7 @@ FEATURES = {
     # Enable support for content libraries. Note that content libraries are
     # only supported in courses using split mongo.
     'ENABLE_CONTENT_LIBRARIES': True,
-    'DISABLE_LIBRARY_CREATION': False
+    'DISABLE_LIBRARY_CREATION': False,
 
     # Milestones application flag
     'MILESTONES_APP': False,