diff --git a/build-constraints.yaml b/build-constraints.yaml
index 45862f89..6e11f220 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -717,9 +717,6 @@ packages:
         # for language-ecmascript as well.
         - language-ecmascript < 0.17
 
-        # https://github.com/fpco/stackage/issues/398
-        - monoid-subclasses < 0.4
-
         # https://github.com/fpco/stackage/issues/402
         - vector-space < 0.9