diff --git a/build-constraints.yaml b/build-constraints.yaml
index 84021792..a1797818 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -402,8 +402,7 @@ packages:
         - serversession-backend-persistent
         - serversession-backend-redis
         - serversession-frontend-snap
-        # <https://github.com/singpolyma/wai-session/pull/7>
-        # - serversession-frontend-wai
+        - serversession-frontend-wai
         - serversession-frontend-yesod
         - thumbnail-plus
         - yesod-fb