diff --git a/expat/xmlparse/xmlparse.c b/expat/xmlparse/xmlparse.c
index c62dbd8b..e7391e4e 100755
--- a/expat/xmlparse/xmlparse.c
+++ b/expat/xmlparse/xmlparse.c
@@ -468,6 +468,18 @@ XML_Parser XML_ParserCreateNS(const XML_Char *encodingName, XML_Char nsSep)
   return parser;
 }
 
+int XML_SetEncoding(XML_Parser parser, const XML_Char *encodingName)
+{
+  if (encodingName)
+    protocolEncodingName = 0;
+  else {
+    protocolEncodingName = poolCopyString(&tempPool, encodingName);
+    if (!protocolEncodingName)
+      return 0;
+  }
+  return 1;
+}
+
 XML_Parser XML_ExternalEntityParserCreate(XML_Parser oldParser,
 					  const XML_Char *context,
 					  const XML_Char *encodingName)
diff --git a/expat/xmlparse/xmlparse.h b/expat/xmlparse/xmlparse.h
index 473f2afe..0c0453af 100755
--- a/expat/xmlparse/xmlparse.h
+++ b/expat/xmlparse/xmlparse.h
@@ -306,6 +306,13 @@ XML_SetUserData(XML_Parser parser, void *userData);
 /* Returns the last value set by XML_SetUserData or null. */
 #define XML_GetUserData(parser) (*(void **)(parser))
 
+/* This is equivalent to supplying an encoding argument
+to XML_CreateParser. It must not be called before XML_Parse
+or XML_ParseBuffer. */
+
+int XMLPARSEAPI
+XML_SetEncoding(XML_Parser parser, const XML_Char *encoding);
+
 /* If this function is called, then the parser will be passed
 as the first argument to callbacks instead of userData.
 The userData will still be accessible using XML_GetUserData. */