diff --git a/build-constraints.yaml b/build-constraints.yaml
index f77738d9..69b7ffc5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1862,6 +1862,9 @@ expected-haddock-failures:
     # Not sure why, but it's a temporary package anyway
     - Cabal-ide-backend
 
+    # https://github.com/vincenthz/hs-certificate/issues/63
+    - x509-validation
+
 # Benchmarks which should not be built. Note that Stackage does *not* generally
 # build benchmarks. The difference here will be whether dependencies for these
 # benchmarks are included or not.