diff --git a/ChangeLog b/ChangeLog
index 58b13b8789..900ef9d62a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Mar 24 22:06:58 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* doc/standard_library.rdoc: strip.
+
 Tue Mar 24 22:06:27 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* doc/standard_library.rdoc: move Thread to Extentions.
diff --git a/doc/standard_library.rdoc b/doc/standard_library.rdoc
index b532b89233..bd15c2ea9a 100644
--- a/doc/standard_library.rdoc
+++ b/doc/standard_library.rdoc
@@ -113,7 +113,3 @@ Thread:: Provides support classes for threaded programs
 Tk:: Provides a framework for building a Graphical User Interface (GUI)
 WIN32OLE:: Provides an interface for OLE Automation in Ruby
 Zlib:: Ruby interface for the zlib compression/decompression library
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-
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