diff --git a/lib/ace/mode/xml/sax.js b/lib/ace/mode/xml/sax.js
index 89e82d4a..952e6979 100644
--- a/lib/ace/mode/xml/sax.js
+++ b/lib/ace/mode/xml/sax.js
@@ -112,7 +112,7 @@ function parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){
 			var localNSMap = config.localNSMap;
 			
          if(config.tagName != tagName){
-             errorHandler.fatalError("end tag name: "+tagName+' is not match the current start tagName:'+config.tagName );
+             errorHandler.fatalError("end tag name: "+tagName+" does not match the current start tagName:"+config.tagName);
          }
          domBuilder.endElement(config.uri,config.localName,tagName);
 			if(localNSMap){