diff --git a/python/demo/demo_tnt-elements.py b/python/demo/demo_tnt-elements.py
index aa98ca433c..eb0bd2bdf6 100644
--- a/python/demo/demo_tnt-elements.py
+++ b/python/demo/demo_tnt-elements.py
@@ -257,7 +257,7 @@ def create_tnt_quad(degree):
         basix.MapType.identity,
         basix.SobolevSpace.H1,
         False,
-        degree - 1,
+        max(degree - 1,1),
         degree,
         dtype=default_real_type,
     )