diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0f2a31a9..6e7d1596 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3858,7 +3858,7 @@ packages:
         - genvalidity-time < 0 # GHC 8.4 via genvalidity-hspec
         - genvalidity-uuid < 0 # GHC 8.4 via genvalidity-hspec
         # follow-file < 0 # GHC 8.4 via hinotify
-        # fsnotify < 0 # GHC 8.4 via hinotify
+        - fsnotify < 0 # GHC 8.4 via hinotify
         # ztail < 0 # GHC 8.4 via hinotify
         - buchhaltung < 0 # GHC 8.4 via hint
         - haskintex < 0 # GHC 8.4 via hint