diff --git a/rds_param_group.py b/rds_param_group.py
index ce271712211..4870d0657fb 100644
--- a/rds_param_group.py
+++ b/rds_param_group.py
@@ -55,7 +55,7 @@
     type: dict
   purge_tags:
     description:
-      - Whether or not to remove tags that do not appear in the M(tags) list.
+      - Whether or not to remove tags that do not appear in the C(tags) list.
     type: bool
     default: False
 author: