diff --git a/examples/demo.py b/examples/demo.py
index cbca0d8458bd32e15d478fe10bdadca03fad4c2c..f22ba45ada48a7c7270661d5e33feb8c98196404 100644
--- a/examples/demo.py
+++ b/examples/demo.py
@@ -9,7 +9,8 @@ bset = (isl.BasicSet.universe(space)
         .add_constraint(isl.Constraint.ineq_from_names(space, {1: 5, "y": -1})))
 print("set 1 %s:" % bset)
 
-bset2 = isl.BasicSet("{[x, y] : x >= 0 and x < 5 and y >= 0 and y < x+4 }")
+bset2 = isl.BasicSet("{[x, y] : x >= 0 and x < 5 and y >= 0 and y < x+4 }",
+                     context=ctx)
 print("set 2: %s" % bset2)
 
 bsets_in_union = []