diff --git a/ipojo/api/src/main/java/org/apache/felix/ipojo/api/PrimitiveComponentType.java b/ipojo/api/src/main/java/org/apache/felix/ipojo/api/PrimitiveComponentType.java
index bc3f937..09e6249 100644
--- a/ipojo/api/src/main/java/org/apache/felix/ipojo/api/PrimitiveComponentType.java
+++ b/ipojo/api/src/main/java/org/apache/felix/ipojo/api/PrimitiveComponentType.java
@@ -369,7 +369,11 @@
         Element meta = m_metadata;
         meta.addElement(m_manipulation);
         try {
-            m_factory = new ComponentFactory(m_context, clazz, meta);
+            if (clazz.length == 0) { // Already manipulated
+                m_factory = new ComponentFactory(m_context, meta);
+            } else {
+                m_factory = new ComponentFactory(m_context, clazz, meta);
+            }
             m_factory.start();
         } catch (ConfigurationException e) {
             throw new IllegalStateException("An exception occurs during factory initialization : " + e.getMessage());