diff --git a/plugins/lookup/merge_variables.py b/plugins/lookup/merge_variables.py
index 638ca41053..dfd123630a 100644
--- a/plugins/lookup/merge_variables.py
+++ b/plugins/lookup/merge_variables.py
@@ -73,10 +73,10 @@ options:
     type: str
     default: deep
     choices:
-      deep: merge dictionaries recursively.
-      shallow: merge only top-level values.
-      replace: overwrite older dict with newer one.
-      keep: discard newer dict.
+      deep: Merge dictionaries recursively.
+      shallow: Merge only top-level values.
+      replace: Overwrite older dict with newer one.
+      keep: Discard newer dict.
     version_added: 12.5.0
   list_merge:
     description: