diff --git a/plugins/autodoc/autodoc-processor/src/main/java/org/eclipse/dataspaceconnector/plugins/autodoc/core/processor/introspection/ModuleIntrospector.java b/plugins/autodoc/autodoc-processor/src/main/java/org/eclipse/dataspaceconnector/plugins/autodoc/core/processor/introspection/ModuleIntrospector.java
index d425e9c2..e08f37c8 100644
--- a/plugins/autodoc/autodoc-processor/src/main/java/org/eclipse/dataspaceconnector/plugins/autodoc/core/processor/introspection/ModuleIntrospector.java
+++ b/plugins/autodoc/autodoc-processor/src/main/java/org/eclipse/dataspaceconnector/plugins/autodoc/core/processor/introspection/ModuleIntrospector.java
@@ -117,7 +117,7 @@ public Set<Element> getExtensionElements(RoundEnvironment environment) {
     private boolean isExtension(Element element) {
 
         var t = (TypeElement) element;
-        while (!t.toString().equals(Object.class.getName())) {
+        while (t != null && !t.toString().equals(Object.class.getName())) {
             if (t.getInterfaces().stream().anyMatch(p -> p.toString().contains(SERVICE_EXTENSION_NAME))) {
                 return true;
             }