diff --git a/src/Handler/Admin/Crontab.hs b/src/Handler/Admin/Crontab.hs
index 670d5ff3e..4f82a3c22 100644
--- a/src/Handler/Admin/Crontab.hs
+++ b/src/Handler/Admin/Crontab.hs
@@ -121,7 +121,7 @@ instance Finite JobTableAction
 nullaryPathPiece ''JobTableAction $ camelToPathPiece' 1
 embedRenderMessage ''UniWorX ''JobTableAction id
 
-data JobTableActionData = ActJobDeleteData 
+newtype JobTableActionData = ActJobDeleteData 
                             { jobDeleteLocked :: Bool
                             }
   deriving (Eq, Ord, Read, Show, Generic)