diff --git a/ChangeLog b/ChangeLog
index 13c8592fe1..f5e05eb3db 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Nov 26 16:36:46 2006  URABE Shyouhei  <shyouhei@ruby-lang.org>
+
+	* version.h: addition of RUBY_PATCHLEVEL.
+	* version.c: ditto.
+
 Fri Nov 24 10:17:51 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* bignum.c (bignorm): avoid segmentation.  a patch from Hiroyuki
diff --git a/version.c b/version.c
index 63c519a6f4..b235673001 100644
--- a/version.c
+++ b/version.c
@@ -17,6 +17,7 @@
 const char ruby_version[] = RUBY_VERSION;
 const char ruby_release_date[] = RUBY_RELEASE_DATE;
 const char ruby_platform[] = RUBY_PLATFORM;
+const int ruby_patchlevel = RUBY_PATCHLEVEL;
 
 void
 Init_version()
@@ -28,6 +29,7 @@ Init_version()
     rb_define_global_const("RUBY_VERSION", v);
     rb_define_global_const("RUBY_RELEASE_DATE", d);
     rb_define_global_const("RUBY_PLATFORM", p);
+    rb_define_global_const("RUBY_PATCHLEVEL", INT2FIX(RUBY_PATCHLEVEL));
 
     /* obsolete constants */
     rb_define_global_const("VERSION", v);
@@ -38,7 +40,7 @@ Init_version()
 void
 ruby_show_version()
 {
-    printf("ruby %s (%s) [%s]\n", RUBY_VERSION, RUBY_RELEASE_DATE, RUBY_PLATFORM);
+    printf("ruby %s (%s patchlevel %d) [%s]\n", RUBY_VERSION, RUBY_RELEASE_DATE, RUBY_PATCHLEVEL, RUBY_PLATFORM);
     fflush(stdout);
 }
 
diff --git a/version.h b/version.h
index 5e1c75df17..c3fe12bc41 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,8 @@
 #define RUBY_VERSION "1.8.5"
-#define RUBY_RELEASE_DATE "2006-11-24"
+#define RUBY_RELEASE_DATE "2006-11-26"
 #define RUBY_VERSION_CODE 185
 #define RUBY_RELEASE_CODE 20061124
+#define RUBY_PATCHLEVEL 0
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8
@@ -13,3 +14,4 @@
 RUBY_EXTERN const char ruby_version[];
 RUBY_EXTERN const char ruby_release_date[];
 RUBY_EXTERN const char ruby_platform[];
+RUBY_EXTERN const int ruby_patchlevel;