@@ -421,7 +421,7 @@ data MonitorRef = MonitorRef
421421 -- | Unique to distinguish multiple monitor requests by the same process
422422 , monitorRefCounter :: !Int32
423423 }
424− deriving (Eq, Ord, Show, Generic)
424+ deriving (Eq, Ord, Show, Typeable, Generic)
425425instance Hashable MonitorRef where
426426
427427-- | Message sent by process monitors