diff --git a/docs/creating-plugins.md b/docs/creating-plugins.md
index b51bbd5e..e7df57d0 100644
--- a/docs/creating-plugins.md
+++ b/docs/creating-plugins.md
@@ -62,7 +62,7 @@ Note: This will only apply for users who have enabled the `legacy_version_file`
 
 #### bin/parse-legacy-file
 
-This can be used to further parse the legacy file found by asdf. If `parse-legacy-file` isn't implemented, asdf will simply cat the file to determine the version.
+This can be used to further parse the legacy file found by asdf. If `parse-legacy-file` isn't implemented, asdf will simply cat the file to determine the version. The script will be passed the file path as its first argument.
 
 ### Custom shim templates