diff --git a/html/relnotes.html b/html/relnotes.html
index d21dfede033d4f178fbd1296bb21704976ca8759..5bede42533159dbdf8790876a361a305cdf319d8 100644
--- a/html/relnotes.html
+++ b/html/relnotes.html
@@ -71,6 +71,8 @@ with a warning:
   preserving the previous behaviour (impl)</li>
 <li>Added level lines in the triangle display of <tt>GroupEval</tt> (util)</li>
 <li>Added <tt>BasicAlignment.deleteAllCells()</tt> (impl)</li>
+<li>Added a guard in <tt>loadOntology</tt> for OWLAPI 3.0, in case the
+  ontology has no URI (ontowrap)</li>
 <li>Suppressed the guard for applying the Hungarian algorithm to
   equisimilarity situations (impl)</li>
 <li>Slightly modified the parser so that it accepts Alignment URI with
diff --git a/src/fr/inrialpes/exmo/ontowrap/owlapi30/OWLAPI3OntologyFactory.java b/src/fr/inrialpes/exmo/ontowrap/owlapi30/OWLAPI3OntologyFactory.java
index f4f340ea0b9ff3bea46b24baebb0f78c90bc02ca..81382dc9e6c79f772ab64a2ca9ca63aab87385fc 100644
--- a/src/fr/inrialpes/exmo/ontowrap/owlapi30/OWLAPI3OntologyFactory.java
+++ b/src/fr/inrialpes/exmo/ontowrap/owlapi30/OWLAPI3OntologyFactory.java
@@ -1,7 +1,7 @@
 /*
  * $Id$
  *
- * Copyright (C) INRIA, 2008-2010
+ * Copyright (C) INRIA, 2008-2011
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -113,7 +113,14 @@ public class OWLAPI3OntologyFactory extends OntologyFactory {
 	onto.setFormURI( formalismUri );
 	onto.setOntology( ontology );
 	onto.setFile( uri );
-	onto.setURI( ontology.getOntologyID().getOntologyIRI().toURI() );
+	try {
+	    onto.setURI( ontology.getOntologyID().getOntologyIRI().toURI() );
+	} catch ( Exception e ) { // Should be a NullPointerException
+	    // Better put in the OntowrapException of loaded
+	    // The ontology has no URI. In principle, it is not valid
+	    // It may be possible to put the uri instead (now it is void)
+	    e.printStackTrace();
+	}
 	cache.recordOntology( uri, onto );
 	//System.err.println( "   after-cache: "+cache.getOntology( uri ) );
 	return onto;