diff --git a/frappy_psi/sea.py b/frappy_psi/sea.py
index e2e7fae..10aa4ad 100644
--- a/frappy_psi/sea.py
+++ b/frappy_psi/sea.py
@@ -721,9 +721,10 @@ class SeaModule(Module):
             sublist = result.get('.')
             if sublist is None:
                 return False
-            if len(sub) == 1 and 'kids' in paramdesc:  # direct kid
-                # do not take main node of a tree
+            if len(sub) > 1 or 'kids' in paramdesc:
+                # avoid params from  subtrees
                 return False
+            # this is a top paramerter without kids
         sublist.append(paramdesc)
         return True