diff --git a/data/hlint.yaml b/data/hlint.yaml
index f40199082..e10eff2ca 100644
--- a/data/hlint.yaml
+++ b/data/hlint.yaml
@@ -241,7 +241,7 @@
     - warn: {lhs: foldr (<>) mempty, rhs: mconcat}
     - warn: {lhs: foldr mappend mempty, rhs: mconcat}
     - warn: {lhs: mempty x, rhs: mempty, name: Evaluate}
-    - warn: {lhs: mempty x y, rhs: mempty, name: Evaluate}
+    - warn: {lhs: x `mempty` y, rhs: mempty, name: Evaluate, note: "Make sure you didn't mean to use mappend instead of mempty"}
 
     # TRAVERSABLES