diff --git a/src/Lean/Elab/GuardMsgs.lean b/src/Lean/Elab/GuardMsgs.lean
index e6acb2d14f..bb2d5a3a43 100644
--- a/src/Lean/Elab/GuardMsgs.lean
+++ b/src/Lean/Elab/GuardMsgs.lean
@@ -200,7 +200,7 @@ def MessageOrdering.apply (mode : MessageOrdering) (msgs : List String) : List S
       match filterFn msg with
       | .check       => toCheck := toCheck.add msg
       | .drop        => pure ()
-      | pass => toPassthrough := toPassthrough.add msg
+      | .pass => toPassthrough := toPassthrough.add msg
     let map ← getFileMap
     let reportPos? :=
       if reportPositions then