diff --git a/ChangeLog b/ChangeLog
index 718f2efe0d..1942509468 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sun Jul 19 20:41:24 2009  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* complex.c (make_patterns): do not use \d.
+
+	* rational.c (make_patterns): ditto.
+
 Fri Apr 30 03:38:14 2010  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* numeric.c (fix_mul): the width of fixnum is same as long's on all
diff --git a/complex.c b/complex.c
index 092289d500..dbaf400c8f 100644
--- a/complex.c
+++ b/complex.c
@@ -1054,7 +1054,7 @@ static VALUE comp_pat0, comp_pat1, comp_pat2, a_slash, a_dot_and_an_e,
     null_string, underscores_pat, an_underscore;
 
 #define WS "\\s*"
-#define DIGITS "(?:\\d(?:_\\d|\\d)*)"
+#define DIGITS "(?:[0-9](?:_[0-9]|[0-9])*)"
 #define NUMERATOR "(?:" DIGITS "?\\.)?" DIGITS "(?:[eE][-+]?" DIGITS ")?"
 #define DENOMINATOR DIGITS
 #define NUMBER "[-+]?" NUMERATOR "(?:\\/" DENOMINATOR ")?"
diff --git a/rational.c b/rational.c
index 70f7f16283..92d884d8d5 100644
--- a/rational.c
+++ b/rational.c
@@ -1313,7 +1313,7 @@ float_to_r(VALUE self)
 static VALUE rat_pat, an_e_pat, a_dot_pat, underscores_pat, an_underscore;
 
 #define WS "\\s*"
-#define DIGITS "(?:\\d(?:_\\d|\\d)*)"
+#define DIGITS "(?:[0-9](?:_[0-9]|[0-9])*)"
 #define NUMERATOR "(?:" DIGITS "?\\.)?" DIGITS "(?:[eE][-+]?" DIGITS ")?"
 #define DENOMINATOR DIGITS
 #define PATTERN "\\A" WS "([-+])?(" NUMERATOR ")(?:\\/(" DENOMINATOR "))?" WS
diff --git a/version.h b/version.h
index a58e24ed8f..2427db7b4c 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.1"
-#define RUBY_PATCHLEVEL 425
+#define RUBY_PATCHLEVEL 426
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1