diff -r 106c5d280835 -r ad36a104623f java/alt2xml-lib-input/src/cz/frantovo/alt2xml/SuperReader.java
--- a/java/alt2xml-lib-input/src/cz/frantovo/alt2xml/SuperReader.java	Sun Jun 08 00:01:29 2014 +0200
+++ b/java/alt2xml-lib-input/src/cz/frantovo/alt2xml/SuperReader.java	Sun Jun 08 09:53:51 2014 +0200
@@ -52,9 +52,9 @@
 	@Override
 	public void parse(InputSource input) throws IOException, SAXException {
 
-		input = new AltInputSource(entityResolver, input);
+		AltInputSource altInput = new AltInputSource(entityResolver, input);
 
-		XMLReader reader = readerFinder.findReader(input.getSystemId());
+		XMLReader reader = readerFinder.findReader(altInput);
 
 		reader.setContentHandler(contentHandler);
 		reader.setDTDHandler(dtdHandler);
@@ -69,7 +69,7 @@
 			reader.setFeature(e.getKey(), e.getValue());
 		}
 
-		reader.parse(input);
+		reader.parse(altInput);
 	}
 
 	@Override