diff --git a/ChangeLog b/ChangeLog
index 8c414eff8c..79f59dc0ee 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec  6 01:37:23 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* regparse.c (i_apply_case_fold): fix for negative character class.  a
+	  patch from Yusuke ENDOH <mame AT tsg.ne.jp> in [ruby-core:13884].
+
 Thu Dec  6 01:00:38 2007  NARUSE, Yui <naruse@ruby-lang.org>
 
 	* ext/iconv/iconv.c (iconv_s_list): support NetBSD/Citrus iconv.
diff --git a/regparse.c b/regparse.c
index 092ba614c3..f86abc80ab 100644
--- a/regparse.c
+++ b/regparse.c
@@ -347,7 +347,7 @@ str_end_hash(st_strend_key* x)
 extern hash_table_type*
 onig_st_init_strend_table_with_size(int size)
 {
-  static struct st_hash_type hashType = {
+  static const struct st_hash_type hashType = {
     str_end_cmp,
     str_end_hash,
   };
@@ -4808,10 +4808,7 @@ i_apply_case_fold(OnigCodePoint from, OnigCodePoint to[],
       }
       else {
 	/* /(?i:[^A-C])/.match("a") ==> fail. */
-	if (IS_NCCLASS_NOT(cc))
-	  BITSET_CLEAR_BIT(bs, *to);
-	else
-	  BITSET_SET_BIT(bs, *to);
+	BITSET_SET_BIT(bs, *to);
       }
     }
   }
diff --git a/version.h b/version.h
index 28591e0ecd..ba44dbcafe 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,7 @@
 #define RUBY_VERSION "1.9.0"
-#define RUBY_RELEASE_DATE "2007-12-05"
+#define RUBY_RELEASE_DATE "2007-12-06"
 #define RUBY_VERSION_CODE 190
-#define RUBY_RELEASE_CODE 20071205
+#define RUBY_RELEASE_CODE 20071206
 #define RUBY_PATCHLEVEL 0
 
 #define RUBY_VERSION_MAJOR 1
@@ -9,7 +9,7 @@
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2007
 #define RUBY_RELEASE_MONTH 12
-#define RUBY_RELEASE_DAY 5
+#define RUBY_RELEASE_DAY 6
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];