diff --git a/diagnose.cabal b/diagnose.cabal
--- a/diagnose.cabal
+++ b/diagnose.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           diagnose
-version:        2.5.0
+version:        2.5.1
 synopsis:       Beautiful error reporting done easily
 description:    This package provides a simple way of getting beautiful compiler/interpreter errors
                 using a very simple interface for the programmer.
diff --git a/src/Error/Diagnose/Compat/Megaparsec.hs b/src/Error/Diagnose/Compat/Megaparsec.hs
--- a/src/Error/Diagnose/Compat/Megaparsec.hs
+++ b/src/Error/Diagnose/Compat/Megaparsec.hs
@@ -47,7 +47,7 @@
   MP.ParseErrorBundle s e ->
   Diagnostic msg
 diagnosticFromBundle isError code msg (fromMaybe [] -> trivialHints) MP.ParseErrorBundle {..} =
-  foldl addReport def (toLabeledPosition <$> bundleErrors)
+  foldl addReport mempty (toLabeledPosition <$> bundleErrors)
   where
     toLabeledPosition :: MP.ParseError s e -> Report msg
     toLabeledPosition error =
diff --git a/src/Error/Diagnose/Compat/Parsec.hs b/src/Error/Diagnose/Compat/Parsec.hs
--- a/src/Error/Diagnose/Compat/Parsec.hs
+++ b/src/Error/Diagnose/Compat/Parsec.hs
@@ -48,7 +48,7 @@
   let pos = fromSourcePos $ PE.errorPos error
       markers = toMarkers pos $ PE.errorMessages error
       report = (if isError error then Err code msg else Warn code msg) markers (defaultHints <> hints (undefined :: Void))
-   in addReport def report
+   in addReport mempty report
   where
     fromSourcePos :: PP.SourcePos -> Position
     fromSourcePos pos =