diff --git a/Language/Haskell/GhcMod/DebugLogger.hs b/Language/Haskell/GhcMod/DebugLogger.hs
new file mode 100644
index 0000000..74b8a49
--- /dev/null
+++ b/Language/Haskell/GhcMod/DebugLogger.hs
@@ -0,0 +1,62 @@
+module Language.Haskell.GhcMod.DebugLogger where
+
+
+import GHC
+import FastString
+import Pretty
+import Outputable (SDoc, PprStyle, runSDoc, initSDocContext, blankLine)
+import qualified Outputable
+import ErrUtils
+import DynFlags (LogAction)
+
+import Language.Haskell.GhcMod.Error
+import Language.Haskell.GhcMod.Output
+import Language.Haskell.GhcMod.Monad.Types
+import Prelude
+
+debugLogAction :: (String -> IO ()) -> LogAction
+debugLogAction putErr dflags severity srcSpan style msg
+    = case severity of
+      SevOutput      -> printSDoc msg style
+      SevDump        -> printSDoc (msg Outputable.$$ blankLine) style
+      SevInteractive -> putStrSDoc msg style
+      SevInfo        -> printErrs msg style
+      SevFatal       -> printErrs msg style
+      _              -> do putErr "\n"
+                           printErrs (mkLocMessage severity srcSpan msg) style
+                           -- careful (#2302): printErrs prints in UTF-8,
+                           -- whereas converting to string first and using
+                           -- hPutStr would just emit the low 8 bits of
+                           -- each unicode char.
+    where printSDoc  = debugLogActionHPrintDoc  dflags putErr
+          printErrs  = debugLogActionHPrintDoc  dflags putErr
+          putStrSDoc = debugLogActionHPutStrDoc dflags putErr
+
+debugLogActionHPrintDoc :: DynFlags -> (String -> IO ()) -> SDoc -> PprStyle -> IO ()
+debugLogActionHPrintDoc dflags put d sty
+ = debugLogActionHPutStrDoc dflags put (d Outputable.$$ Outputable.text "") sty
+      -- Adds a newline
+
+debugLogActionHPutStrDoc :: DynFlags -> (String -> IO ()) -> SDoc -> PprStyle -> IO ()
+debugLogActionHPutStrDoc dflags put d sty
+  = gmPrintDoc_ Pretty.PageMode (pprCols dflags) put doc
+  where   -- Don't add a newline at the end, so that successive
+          -- calls to this log-action can output all on the same line
+    doc = runSDoc d (initSDocContext dflags sty)
+
+
+gmPrintDoc :: Mode -> Int -> (String -> IO ()) -> Doc -> IO ()
+-- printDoc adds a newline to the end
+gmPrintDoc mode cols put doc = gmPrintDoc_ mode cols put (doc $$ text "")
+
+gmPrintDoc_ :: Mode -> Int -> (String -> IO ()) -> Doc -> IO ()
+gmPrintDoc_ mode pprCols putS doc
+  = fullRender mode pprCols 1.5 put done doc
+  where
+    put (Chr c)  next = putS [c] >> next
+    put (Str s)  next = putS s >> next
+    put (PStr s) next = putS (unpackFS s) >> next
+    put (ZStr s) next = putS (zString s) >> next
+    put (LStr s _l) next = putS (unpackLitString s) >> next
+
+    done = return () -- hPutChar hdl '\n'