diff --git a/src/fr/inrialpes/exmo/align/onto/OntologyFactory.java b/src/fr/inrialpes/exmo/align/onto/OntologyFactory.java
index 56517ef226022fdb243781ac2d773664335c0b6f..50eec7e4cfc8e3c74b6c809328e46ec11f877d0f 100644
--- a/src/fr/inrialpes/exmo/align/onto/OntologyFactory.java
+++ b/src/fr/inrialpes/exmo/align/onto/OntologyFactory.java
@@ -76,7 +76,7 @@ public abstract class OntologyFactory {
 
     public static void clear() {
 	for ( OntologyFactory of : instances.values() ){
-	    of.clear();
+	    of.clearCache();
 	}
     }