diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4f84490fa..251da32c5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8443,7 +8443,7 @@ packages:
         - http2 < 5.1.0
 
         # https://github.com/commercialhaskell/stackage/issues/7309
-        # zlib < 0.7
+        - zlib < 0.7
 
         # https://github.com/commercialhaskell/stackage/issues/7312
         - numhask < 0.12