diff --git a/build-constraints.yaml b/build-constraints.yaml
index 65819b11..6795637e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2155,6 +2155,8 @@ packages:
         # https://github.com/fpco/stackage/issues/1298
         - morte < 1.5
 
+        # https://github.com/fpco/stackage/issues/1321
+        - foldl < 1.2.0
 # end of packages