diff --git a/recommenders/utils/general_utils.py b/recommenders/utils/general_utils.py
index 7d8291ab96..1521acab35 100644
--- a/recommenders/utils/general_utils.py
+++ b/recommenders/utils/general_utils.py
@@ -6,7 +6,7 @@
 
 
 def invert_dictionary(dictionary):
-    """Invert a dictionary
+    """Invert a dictionary.
 
     .. note::