diff --git a/lib/ansible/modules/files/synchronize.py b/lib/ansible/modules/files/synchronize.py
index bdafe9f093..aaa79b69fa 100644
--- a/lib/ansible/modules/files/synchronize.py
+++ b/lib/ansible/modules/files/synchronize.py
@@ -145,6 +145,7 @@ options:
     choices:
       - "yes"
       - "no"
+    version_added: "2.0"
   rsync_opts:
     description:
       - Specify additional rsync options by passing in an array.