diff --git a/pargraph/engine/engine.py b/pargraph/engine/engine.py
index 800c27b..3bd1d4a 100644
--- a/pargraph/engine/engine.py
+++ b/pargraph/engine/engine.py
@@ -10,7 +10,7 @@
 try:
     from pargraph.utility.graphlib_graphblas import TopologicalSorter
 except ImportError:
-    from graphlib import TopologicalSorter  # type: ignore[assignment]
+    from graphlib import TopologicalSorter  # type: ignore[assignment,no-redef]
 
 
 class Backend(metaclass=abc.ABCMeta):