diff --git a/ChangeLog b/ChangeLog
index e696f9ab8e..31072a8b10 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Feb  8 09:27:57 2008  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* lib/rdoc/ri/driver.rb (read_yaml): remove SM* for compatibility.
+
 Fri Feb 08 00:07:24 2008  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* test/ruby/test_hash.rb: follow the change of Hash#flatten.
diff --git a/lib/rdoc/ri/driver.rb b/lib/rdoc/ri/driver.rb
index 67817b1806..02271de3dd 100644
--- a/lib/rdoc/ri/driver.rb
+++ b/lib/rdoc/ri/driver.rb
@@ -341,7 +341,7 @@ Options may also be set in the 'RI' environment variable.
   end
 
   def read_yaml(path)
-    YAML.load File.read(path).gsub(/ \!ruby\/(object|struct):(RDoc::RI|RI).*/, '')
+    YAML.load File.read(path).gsub(/ \!ruby\/(object|struct):(RDoc::RI|RI|SM).*/, '')
   end
 
   def run