diff --git a/doc/development/snowplow/event_dictionary_guide.md b/doc/development/snowplow/event_dictionary_guide.md
index 86975339cd63edeae3eae24895fe26d1e77b8fc7..2d9fd1e4a393fe3b074ba2c160b4e0ab0078de96 100644
--- a/doc/development/snowplow/event_dictionary_guide.md
+++ b/doc/development/snowplow/event_dictionary_guide.md
@@ -86,6 +86,7 @@ The generator takes three options:
 - `--ee`: Indicates if the event is for EE.
 - `--category=CATEGORY`: Indicates the `category` of the event.
 - `--action=ACTION`: Indicates the `action` of the event.
+- `--ff`: Force flag to overwrite existing event definition.
 
 ```shell
 bundle exec rails generate gitlab:snowplow_event_definition --category Groups::EmailCampaignsController --action click