diff --git a/ChangeLog b/ChangeLog
index 4eb6eccce1..536fbbad35 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Oct 17 01:57:06 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* re.c (rb_reg_initialize_m): allow binary encoding option.
+	  [ruby-dev:32083]
+
 Tue Oct 16 19:48:01 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* re.c (rb_reg_s_union): check for encoding of original object.
diff --git a/re.c b/re.c
index b117cb4651..d6bff5ea94 100644
--- a/re.c
+++ b/re.c
@@ -1573,7 +1573,7 @@ rb_reg_initialize_m(int argc, VALUE *argv, VALUE self)
     int flags = 0;
     VALUE str;
 
-    if (argc == 0 || argc > 2) {
+    if (argc == 0 || argc > 3) {
 	rb_raise(rb_eArgError, "wrong number of arguments");
     }
     if (TYPE(argv[0]) == T_REGEXP) {
@@ -1600,7 +1600,17 @@ rb_reg_initialize_m(int argc, VALUE *argv, VALUE self)
 	    if (FIXNUM_P(argv[1])) flags = FIX2INT(argv[1]);
 	    else if (RTEST(argv[1])) flags = ONIG_OPTION_IGNORECASE;
 	}
+	if (argc == 3 && !NIL_P(argv[2])) {
+	    char *kcode = StringValuePtr(argv[2]);
+	    if (kcode[0] == 'n' || kcode[1] == 'N') {
+		flags |= ARG_KCODE_NONE;
+	    }
+	    else {
+		rb_warning("encoding option is obsolete - %s", kcode);
+	    }
+	}
 	str = argv[0];
+	StringValueCStr(str);
 	if (rb_reg_initialize_str(self, str, flags, err)) {
 	    rb_reg_raise_str(str, flags, err);
 	}
diff --git a/version.h b/version.h
index 78a54e255a..8158ad959f 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,7 @@
 #define RUBY_VERSION "1.9.0"
-#define RUBY_RELEASE_DATE "2007-10-16"
+#define RUBY_RELEASE_DATE "2007-10-17"
 #define RUBY_VERSION_CODE 190
-#define RUBY_RELEASE_CODE 20071016
+#define RUBY_RELEASE_CODE 20071017
 #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 10
-#define RUBY_RELEASE_DAY 16
+#define RUBY_RELEASE_DAY 17
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];