diff --git a/ChangeLog b/ChangeLog
index 3374c11839..6cd5f99fbd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu May 12 09:53:57 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* version.c (ruby_show_version): flush for non-tty stdout.
+
 Thu May 12 01:23:55 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* eval.c (unknown_node): ignore broken NODE to get rid of accessing
diff --git a/version.c b/version.c
index 0f0bfd361e..acf34ce5f1 100644
--- a/version.c
+++ b/version.c
@@ -34,6 +34,7 @@ void
 ruby_show_version()
 {
     printf("ruby %s (%s) [%s]\n", RUBY_VERSION, RUBY_RELEASE_DATE, RUBY_PLATFORM);
+    fflush(stdout);
 }
 
 void