diff --git a/build-constraints.yaml b/build-constraints.yaml
index edea5905..89f8bbe7 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6876,7 +6876,7 @@ packages:
       - heaps < 0.4
 
       # https://github.com/commercialhaskell/stackage/issues/5878
-      # hashable < 1.3.1.0
+      - hashable < 1.3.1.0
 
       # https://github.com/commercialhaskell/stackage/issues/5881
       - optics < 0.4