diff --git a/collects/typed-scheme/private/base-types-new.ss b/collects/typed-scheme/private/base-types-new.ss
index 33ea9c7b..7e52866c 100644
--- a/collects/typed-scheme/private/base-types-new.ss
+++ b/collects/typed-scheme/private/base-types-new.ss
@@ -37,6 +37,7 @@
 [Keyword -Keyword]
 [Listof -Listof]
 [Vectorof (-poly (a) (make-Vector a))]
+[FlVector -FlVector]
 [Option (-poly (a) (-opt a))]
 [HashTable (-poly (a b) (-HT a b))]
 [Promise (-poly (a) (-Promise a))]