diff --git a/src/pystencils_autodiff/autodiff.py b/src/pystencils_autodiff/autodiff.py
index 54c38d20c97397d105df445d4766d025541090e8..e167b272d1a0e12c8594f65658357ba9ee9cb31c 100644
--- a/src/pystencils_autodiff/autodiff.py
+++ b/src/pystencils_autodiff/autodiff.py
@@ -99,7 +99,7 @@ Backward:
                 raise NotImplementedError()
 
     def __hash__(self):
-        return hash(self.forward_assignments, self.backward_assignments)
+        return hash((self.forward_assignments, self.backward_assignments))
 
     def __repr__(self):
         return self._REPR_TEMPLATE.render(forward_assignments=str(self.forward_assignments),