diff --git a/Hidden/SrcRegActList.hs b/Hidden/SrcRegActList.hs
--- a/Hidden/SrcRegActList.hs
+++ b/Hidden/SrcRegActList.hs
@@ -74,6 +74,7 @@
 charClassList = [
    ( "alnum", isAlphaNum                 )
  , ( "alpha", isAlpha                    )
+ , ( "blank", isSpace                    )
  , ( "cntrl", isControl                  )
  , ( "digit", isDigit                    )
  , ( "graph", isPrint &&& (not.) isSpace )
diff --git a/Hidden/TestMain.hs b/Hidden/TestMain.hs
--- a/Hidden/TestMain.hs
+++ b/Hidden/TestMain.hs
@@ -149,5 +149,7 @@
  , Just ( ("bcd", ("a", "e")), [] )     ~=?
      matchRegexPR "(?x)# hello\n# goodbye\n\t\tbcd\n\n" "abcde"
  , Just ( ("bcd", ("a", "e")), [] )     ~=? matchRegexPR "b[[:alnum:]]d" "abcde"
- , Just ( ("90af", ("", "g")), [] )    ~=? matchRegexPR "[[:xdigit:]]+" "90afg"
+ , Just ( ("90af", ("", "g")), [] )     ~=? matchRegexPR "[[:xdigit:]]+" "90afg"
+ , Just ( (" \n\t\r", ("", "a")), [] )  ~=?
+     matchRegexPR "[[:blank:]]+" " \n\t\ra"
  ]
diff --git a/regexpr.cabal b/regexpr.cabal
--- a/regexpr.cabal
+++ b/regexpr.cabal
@@ -1,5 +1,5 @@
 Name:		regexpr
-Version:	0.1.6
+Version:	0.1.7
 License:	GPL
 License-File:	LICENSE
 Author:		Yoshikuni Jujo <PAF01143@nifty.ne.jp>