diff --git a/README.md b/README.md
index 31610a8..46c3fa0 100644
--- a/README.md
+++ b/README.md
@@ -167,7 +167,7 @@ defined filter methods in the [dos2unix](./plugins/dos2unix) and
 [branch_name_in_commit](./plugins/branch_name_in_commit) plugins.
 
 ```
-commit_data = {'branch': branch, 'parents': parents, 'author': author, 'desc': desc}
+commit_data = {'branch': branch, 'parents': parents, 'author': author, 'desc': desc, 'revision': revision}
 
 def commit_message_filter(self,commit_data):
 ```
diff --git a/hg-fast-export.py b/hg-fast-export.py
index ea6c6ac..d830296 100755
--- a/hg-fast-export.py
+++ b/hg-fast-export.py
@@ -304,7 +304,7 @@ def export_commit(ui,repo,revision,old_marks,max,count,authors,
   author = get_author(desc,user,authors)
 
   if plugins and plugins['commit_message_filters']:
-    commit_data = {'branch': branch, 'parents': parents, 'author': author, 'desc': desc}
+    commit_data = {'branch': branch, 'parents': parents, 'author': author, 'desc': desc, 'revision': revision}
     for filter in plugins['commit_message_filters']:
       filter(commit_data)
     branch = commit_data['branch']