diff --git a/metafacture-biblio/src/main/java/org/metafacture/biblio/marc21/MarcXmlHandler.java b/metafacture-biblio/src/main/java/org/metafacture/biblio/marc21/MarcXmlHandler.java
index 76340b66b..16632cc66 100644
--- a/metafacture-biblio/src/main/java/org/metafacture/biblio/marc21/MarcXmlHandler.java
+++ b/metafacture-biblio/src/main/java/org/metafacture/biblio/marc21/MarcXmlHandler.java
@@ -28,7 +28,7 @@
 import org.xml.sax.SAXException;
 
 /**
- * A marc xml reader.
+ * A marc xml reader. To read marc data without namespace specification set option `namespace=""` or to null when using JAVA code.
  * @author Markus Michael Geipel
  *
  */