diff --git a/org.apache.felix.framework/src/main/java/org/apache/felix/framework/Felix.java b/org.apache.felix.framework/src/main/java/org/apache/felix/framework/Felix.java
index 893d6ea..5770f97 100644
--- a/org.apache.felix.framework/src/main/java/org/apache/felix/framework/Felix.java
+++ b/org.apache.felix.framework/src/main/java/org/apache/felix/framework/Felix.java
@@ -3207,7 +3207,7 @@
                 if (clazz == null)
                 {
                     throw new BundleException("Not found: "
-                        + className);
+                        + className, new ClassNotFoundException(className));
                 }
                 activator = (BundleActivator) clazz.newInstance();
             }