diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6dea0e0d..97c96a7d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3137,6 +3137,9 @@ expected-haddock-failures:
     # Haddock bugs
     - swagger2 # https://github.com/GetShopTV/swagger2/issues/66
 
+    # "Argument list too long"
+    - classy-prelude-yesod
+
 # end of expected-haddock-failures
 
 # Benchmarks which should not be built. Note that Stackage builds benchmarks but does not run them.