diff --git a/build-constraints.yaml b/build-constraints.yaml
index 40b9c8c1..ac815925 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3236,6 +3236,7 @@ packages:
 
         # https://github.com/haskell/haddock/issues/634
         - haddock < 2.17.4
+        - haddock-api < 2.17.4
 
 # end of packages