diff --git a/mozilla/content/xml/document/src/nsXMLContentSink.cpp b/mozilla/content/xml/document/src/nsXMLContentSink.cpp
index 0abf7d7c063..cca579d3ac1 100644
--- a/mozilla/content/xml/document/src/nsXMLContentSink.cpp
+++ b/mozilla/content/xml/document/src/nsXMLContentSink.cpp
@@ -724,6 +724,7 @@ nsXMLContentSink::CloseContainer(const nsIParserNode& aNode)
       if (mStyleElement) {
         result = ProcessSTYLETag(aNode);
         mStyleElement=nsnull;
+        mStyleText.Truncate();
       }
     }
   }