diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9c03456b..bca92be5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2957,6 +2957,7 @@ packages:
         - fast-digits
         - chimera
         - quadratic-irrational
+        - quickcheck-classes
 
     "Ashley Yakeley <ashley@semantic.org> @AshleyYakeley":
         - countable