diff --git a/force_bdss/ids.py b/force_bdss/ids.py
index b6b89379101e0ae6a45b5f3252273553514e2bf8..2af5c0b5541a3132eb9010067cc9194e4b5fd165 100644
--- a/force_bdss/ids.py
+++ b/force_bdss/ids.py
@@ -33,11 +33,13 @@ def bundle_id(producer, identifier):
 
 
 def mco_parameter_id(producer, identifier):
+    """Creates an ID for an MCO parameter, so that it can be identified
+    uniquely."""
     return _string_id("mco_parameter", producer, identifier)
 
 
 def plugin_id(producer, identifier):
-    """Creates an ID for the plugins. These must be defined, otherwise 
+    """Creates an ID for the plugins. These must be defined, otherwise
     the envisage system will complain (but not break)
     """
     return _string_id("plugin", producer, identifier)