diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87b0cfe..aa4b1ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,8 +27,7 @@ All notable changes to this project will be documented in this file. See [standa
   ```
   ast-grep scan -r sg-rules/0.6.0-rewrite-blank.yml . -i
   ```
-  It's not 100% safe, as it can introduce `,,` in your code, so be careful to
-  review, clean it up and test.
+  Be careful to review, clean it up and test.
 
 * Switch to mongoengine style field arguments. Drop old django ([#200](https://github.com/MongoEngine/django-mongoengine/issues/200)) ([9d56f6a](https://github.com/MongoEngine/django-mongoengine/commit/9d56f6a58ccee93e2acae7af0a8d81d9aa43ae5b))
 
diff --git a/sg-rules/0.6.0-rewrite-blank.yml b/sg-rules/0.6.0-rewrite-blank.yml
index 8e10dae..b65485b 100644
--- a/sg-rules/0.6.0-rewrite-blank.yml
+++ b/sg-rules/0.6.0-rewrite-blank.yml
@@ -28,6 +28,6 @@ transform:
   MAYBE_COMMA:
     replace:
       source: $$$A
-      replace: '^.+'
+      replace: '^.+[^,]$'
       by: ', '
 fix: fields.$C($$$A$MAYBE_COMMArequired=True)