diff --git a/collects/scribblings/guide/lists.scrbl b/collects/scribblings/guide/lists.scrbl
index abc4a5da42..5ce20476a5 100644
--- a/collects/scribblings/guide/lists.scrbl
+++ b/collects/scribblings/guide/lists.scrbl
@@ -218,7 +218,7 @@ list is exhausted.
 
 You can avoid piling up additions by adding along the way. To
 accumulate a length this way, we need a function that takes both a
-list and the length of the list seem so far; the code below uses a
+list and the length of the list seen so far; the code below uses a
 local function @racket[iter] that accumulates the length in an
 argument @racket[len]: