2 files changed, 8 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index f7721c0f2f..06082f9d00 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Jul 20 17:20:54 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* random.c (rb_random_real): refine error message.
+
 Fri Jul 20 11:03:17 2012  Eric Hodel  <drbrain@segment7.net>
 
 	* NEWS:  Updated net/http for automatic proxy detection (#6546) and
diff --git a/random.c b/random.c
index 197a80f529..a1fb3a800b 100644
--- a/random.c
+++ b/random.c
@@ -932,7 +932,10 @@ rb_random_real(VALUE obj)
     if (!rnd) {
 	VALUE v = rb_funcall2(obj, id_rand, 0, 0);
 	double d = NUM2DBL(v);
-	if (d < 0.0 || d >= 1.0) {
+	if (d < 0.0) {
+	    rb_raise(rb_eRangeError, "random number too small %g", d);
+	}
+	else if (d >= 1.0) {
 	    rb_raise(rb_eRangeError, "random number too big %g", d);
 	}
 	return d;