diff --git a/src/Handler/Admin/Crontab.hs b/src/Handler/Admin/Crontab.hs
index 5806edd60..17e62581b 100644
--- a/src/Handler/Admin/Crontab.hs
+++ b/src/Handler/Admin/Crontab.hs
@@ -118,7 +118,7 @@ instance Finite JobTableAction
 nullaryPathPiece ''JobTableAction $ camelToPathPiece' 1
 embedRenderMessage ''UniWorX ''JobTableAction id
 
-data JobTableActionData = ActJobDeleteData
+newtype JobTableActionData = ActJobDeleteData
   deriving (Eq, Ord, Read, Show, Generic)