diff --git a/meshmode/discretization/poly_element.py b/meshmode/discretization/poly_element.py
index e27ba63c011a9bd59683daea841742f5cc9884ea..5f636e78165f46b32ecb9c41e2883927ece81f82 100644
--- a/meshmode/discretization/poly_element.py
+++ b/meshmode/discretization/poly_element.py
@@ -102,7 +102,7 @@ class PolynomialElementGroupBase(ElementGroupBase):
 
 # {{{ concrete element groups for simplices
 
-class PolynomialSimplexElementGroupBase(ElementGroupBase):
+class PolynomialSimplexElementGroupBase(PolynomialElementGroupBase):
     def is_orthogonal_basis(self):
         return self.dim <= 3