diff --git a/swh/scanner/model.py b/swh/scanner/model.py
--- a/swh/scanner/model.py
+++ b/swh/scanner/model.py
@@ -98,8 +98,8 @@
             if child_node.pid:
                 child_tree[rel_path] = child_node.pid
             else:
-                next_tree = child_node.getJsonChild()
+                next_tree = child_node.getJsonTree()
                 if next_tree:
-                    child_tree[rel_path] = child_node.getJsonTree()
+                    child_tree[rel_path] = next_tree
 
         return child_tree