diff --git a/build-constraints.yaml b/build-constraints.yaml
index cf20afc7..b2707211 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6433,6 +6433,8 @@ expected-haddock-failures:
 
     # https://github.com/haskell/haddock/issues/1091
     - vault
+    # commercialhaskell/stackage#4904
+    - monoid-subclasses
 # end of expected-haddock-failures
 
 # For packages with haddock issues