diff --git a/build-constraints.yaml b/build-constraints.yaml
index a78f9ebb..538728f0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1851,6 +1851,9 @@ expected-test-failures:
     # https://github.com/ddssff/cabal-debian/issues/50
     - cabal-debian
 
+    # https://github.com/barrucadu/dejafu/issues/14
+    - dejafu
+
 # Haddocks which are expected to fail. Same concept as expected test failures.
 expected-haddock-failures:
     # https://github.com/acw/bytestring-progress/issues/4