diff --git a/ChangeLog b/ChangeLog
index 4961c0cd6a..8885eb48dd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jan 15 20:44:30 2009  Tanaka Akira  <akr@fsij.org>
+
+	* tool/file2lastrev.rb: RUBY_REVISION must be an integer.
+
 Thu Jan 15 15:55:31 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* encoding.c (enc_set_default_encoding): should not treat US-ASCII
diff --git a/tool/file2lastrev.rb b/tool/file2lastrev.rb
index ea11304703..ddc83e8631 100644
--- a/tool/file2lastrev.rb
+++ b/tool/file2lastrev.rb
@@ -82,7 +82,7 @@ case $output
 when :changed, nil
   puts changed
 when :revision_h
-  puts "#define RUBY_REVISION #{changed}"
+  puts "#define RUBY_REVISION #{changed.to_i}"
 when :doxygen
   puts "r#{changed}/r#{last}"
 else