diff --git a/ChangeLog b/ChangeLog
index 073f3eeb5a..4b7e28345e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Fri Aug  7 03:22:50 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* eval.c (rb_exc_raise, rb_exc_fatal): nil is used to reraise.
+
+Wed Aug  5 12:54:00 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* eval.c (rb_exc_raise, rb_exc_fatal): require exception object.
+	  [ruby-core:24767]
+
 Fri Aug  7 01:49:41 2009  Akinori MUSHA  <knu@iDaemons.org>
 
 	* ext/digest/sha2/sha2.c: The ULL suffix is not supported by
diff --git a/eval.c b/eval.c
index 3cbc60f47c..49d544f1c4 100644
--- a/eval.c
+++ b/eval.c
@@ -413,12 +413,18 @@ rb_longjmp(int tag, VALUE mesg)
 void
 rb_exc_raise(VALUE mesg)
 {
+    if (!NIL_P(mesg)) {
+	mesg = rb_make_exception(1, &mesg);
+    }
     rb_longjmp(TAG_RAISE, mesg);
 }
 
 void
 rb_exc_fatal(VALUE mesg)
 {
+    if (!NIL_P(mesg)) {
+	mesg = rb_make_exception(1, &mesg);
+    }
     rb_longjmp(TAG_FATAL, mesg);
 }
 
diff --git a/version.h b/version.h
index 24ffab997c..36f267d598 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.1"
-#define RUBY_PATCHLEVEL 280
+#define RUBY_PATCHLEVEL 281
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1