diff --git a/ipojo/runtime/composite/src/main/java/org/apache/felix/ipojo/composite/CompositeInstanceDescription.java b/ipojo/runtime/composite/src/main/java/org/apache/felix/ipojo/composite/CompositeInstanceDescription.java
index f451686..802ddcb 100644
--- a/ipojo/runtime/composite/src/main/java/org/apache/felix/ipojo/composite/CompositeInstanceDescription.java
+++ b/ipojo/runtime/composite/src/main/java/org/apache/felix/ipojo/composite/CompositeInstanceDescription.java
@@ -83,7 +83,8 @@
         ServiceContext internal = ((CompositeManager) m_instance)
                 .getServiceContext();
         try {
-            ServiceReference[] refs = internal.getServiceReferences(null, "(!(objectclass=" + Factory.class.getName() + "))");
+            ServiceReference[] refs = internal.getServiceReferences((String) null, "(!(objectclass=" + Factory.class
+                    .getName() + "))");
             for (int i = 0; refs != null && i < refs.length; i++) {
                 Element svc = new Element("service", "");
                 String[] keys = refs[i].getPropertyKeys();