diff --git a/ChangeLog b/ChangeLog
index a78b0f9f8f..fc6ee0d0a2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Sun Jul  7 11:49:19 2013  Kouhei Sutou  <kou@cozmixng.org>
+
+	* lib/rexml/text.rb (REXML::Text#<<): Support appending in not
+	  "raw" mode. [Bug #8602] [ruby-dev:47482]
+	  Reported by Ippei Obayashi. Thanks!!!
+	* test/rexml/test_text.rb (TextTester#test_shift_operator_cache):
+	  Add a test for the above case.
+
 Sun Jul  7 11:43:13 2013  Kouhei Sutou  <kou@cozmixng.org>
 
 	* lib/rexml/text.rb (REXML::Text#<<): Support method chain use by "<<"
diff --git a/lib/rexml/text.rb b/lib/rexml/text.rb
index 0e45265a17..d3242ee46d 100644
--- a/lib/rexml/text.rb
+++ b/lib/rexml/text.rb
@@ -191,6 +191,7 @@ module REXML
     # 'text << "XXX" << "YYY"'.
     def <<( to_append )
       @string << to_append.gsub( /\r\n?/, "\n" )
+      clear_cache
       self
     end