diff --git a/lib/CheckDir.hs b/lib/CheckDir.hs
index 1cfd753089444dd53644288919d7e13bbfda8bcd..f21fe9c14536ee4d94f85e0c1c35dc5b2ee6cbfa 100644
--- a/lib/CheckDir.hs
+++ b/lib/CheckDir.hs
@@ -103,6 +103,7 @@ instance ToJSON DirResult where
     , "resultText" .= prettyprint (Suggestion, res)
     , "severity" .= maximumLintLevel res
     , "badges" .= annotatedBadges
+    , "maps" .= M.keys (dirresultMaps res)
     ]
     where annotatedBadges = concat
             . M.elems