diff --git a/build-constraints.yaml b/build-constraints.yaml
index 888098df..5b05edb5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2229,6 +2229,8 @@ expected-haddock-failures:
     # https://github.com/fpco/stackage/issues/994
     - Michelangelo
 
+    # https://github.com/fpco/stackage/issues/1015
+    - dejafu
 # end of expected-haddock-failures