diff --git a/plexpy/libraries.py b/plexpy/libraries.py
index 43f5ae2b..70235714 100644
--- a/plexpy/libraries.py
+++ b/plexpy/libraries.py
@@ -653,7 +653,7 @@ class Libraries(object):
                         'JOIN session_history_metadata ON session_history_metadata.id = session_history.id ' \
                         'JOIN users ON users.user_id = session_history.user_id ' \
                         'WHERE section_id = ? ' \
-                        'GROUP BY user ' \
+                        'GROUP BY users.user_id ' \
                         'ORDER BY user_count DESC'
                 result = monitor_db.select(query, args=[section_id])
             else:
@@ -834,4 +834,4 @@ class Libraries(object):
             else:
                 return 'Unable to delete media info table cache, section_id not valid.'
         except Exception as e:
-            logger.warn(u"PlexPy Libraries :: Unable to delete media info table cache: %s." % e)
\ No newline at end of file
+            logger.warn(u"PlexPy Libraries :: Unable to delete media info table cache: %s." % e)