diff --git a/ChangeLog b/ChangeLog
index 84da82d94b..f5b395df3c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Sep 30 00:00:30 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (THREAD_MODEL): modified message when no thread
+	  model is available.
+
 Tue Sep 29 23:17:32 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* io.c (rb_scan_open_args): rb_utf8mac_encoding is undefined.
diff --git a/configure.in b/configure.in
index 03577ddb84..e56766244c 100644
--- a/configure.in
+++ b/configure.in
@@ -2246,6 +2246,9 @@ when(pthread)
     ;;
 when(win32)
     ;;
+when("")
+    AC_MSG_ERROR(thread model is missing)
+    ;;
 when(*)
     AC_MSG_ERROR(unknown thread model $THREAD_MODEL)
     ;;
diff --git a/version.h b/version.h
index 9afaaaecd8..4dec05328b 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_RELEASE_DATE "2009-09-29"
+#define RUBY_RELEASE_DATE "2009-09-30"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
@@ -8,7 +8,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 9
-#define RUBY_RELEASE_DAY 29
+#define RUBY_RELEASE_DAY 30
 
 #include "ruby/version.h"