diff --git a/src/obitaxonomy.py b/src/obitaxonomy.py
index 4a6b694..1404f27 100644
--- a/src/obitaxonomy.py
+++ b/src/obitaxonomy.py
@@ -290,7 +290,7 @@ if __name__ == '__main__':
                         keyError = True
                         for p in possible_previous :
                             if options.taxonomy.isAncestor(restricting_ancestor, p[0]) :
-                                taxid = p[0]
+                                previous = p[0]
                                 keyError = False
                         if keyError :
                             raise KeyError()