diff --git a/GHCMod.hs b/GHCMod.hs
--- a/GHCMod.hs
+++ b/GHCMod.hs
@@ -21,7 +21,7 @@
 ----------------------------------------------------------------
 
 usage :: String
-usage =    "ghc-mod version 0.5.4\n"
+usage =    "ghc-mod version 0.5.5\n"
         ++ "Usage:\n"
         ++ "\t ghc-mod list [-l]\n"
         ++ "\t ghc-mod lang [-l]\n"
diff --git a/elisp/ghc-flymake.el b/elisp/ghc-flymake.el
--- a/elisp/ghc-flymake.el
+++ b/elisp/ghc-flymake.el
@@ -78,7 +78,7 @@
   (with-temp-buffer
     (insert str)
     (goto-char (point-min))
-    (when (re-search-forward "Inferred type: " nil t)
+    (when (re-search-forward "Inferred type: \\|no type signature:\\( \\|\0 +\\)?" nil t)
       (delete-region (point-min) (point)))
     (when (re-search-forward " forall [^.]+\\." nil t)
       (replace-match ""))
@@ -95,7 +95,7 @@
   (dolist (data (ghc-flymake-err-list))
     (save-excursion
       (cond
-       ((string-match "Inferred type: " data)
+       ((string-match "Inferred type: \\|no type signature:" data)
 	(beginning-of-line)
 	(insert (ghc-extract-type data) "\n"))
        ((string-match "lacks an accompanying binding" data)
diff --git a/elisp/ghc.el b/elisp/ghc.el
--- a/elisp/ghc.el
+++ b/elisp/ghc.el
@@ -16,7 +16,7 @@
 
 ;;; Code:
 
-(defconst ghc-version "0.5.4")
+(defconst ghc-version "0.5.5")
 
 ;; (eval-when-compile
 ;;  (require 'haskell-mode))
diff --git a/ghc-mod.cabal b/ghc-mod.cabal
--- a/ghc-mod.cabal
+++ b/ghc-mod.cabal
@@ -1,5 +1,5 @@
 Name:                   ghc-mod
-Version:                0.5.4
+Version:                0.5.5
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3