diff --git a/Custom-Post-Processing-Scripts.md b/Custom-Post-Processing-Scripts.md
index e72269a..0f528c7 100644
--- a/Custom-Post-Processing-Scripts.md
+++ b/Custom-Post-Processing-Scripts.md
@@ -37,6 +37,7 @@ Radarr can execute a custom script when new movies are imported or renamed, depe
 | MovieFile_SceneName | Original release name |
 | MovieFile_SourcePath | Full path to the episode file that was imported |
 | MovieFile_SourceFolder | Full path to the folder the episode file was imported from |
+| Download_Id | The hash of the torrent/NZB file downloaded (used to uniquely identify the download in the download client) |
 
 ##### On Rename #####