diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4bd4b56b..0da3c786 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7850,6 +7850,7 @@ expected-benchmark-failures:
 expected-haddock-failures:
 
     # Compilation with GHC 9.0.1 crashes with Prelude.chr: bad argument
+    - AC-Angle
 
     # Requires build before haddock, which doesn't always happen in incremental
     # builds. Could consider special-casing this requirement.