diff --git a/collects/typed-scheme/ts-reference.scrbl b/collects/typed-scheme/ts-reference.scrbl
index 7981ffe70d..09569bf349 100644
--- a/collects/typed-scheme/ts-reference.scrbl
+++ b/collects/typed-scheme/ts-reference.scrbl
@@ -90,7 +90,7 @@ The following base types are parameteric in their type arguments.
 types @scheme[t ...].  This can only appear as the return type of a
 function.}
 @defform/none[v]{where @scheme[v] is a number, boolean or string, is the singleton type containing only that value}
-@defform/none['val]{where @scheme[val] is a Scheme value, is the singleton type containing only that value}
+@defform/none[(quote val)]{where @scheme[val] is a Scheme value, is the singleton type containing only that value}
 @defform/none[i]{where @scheme[i] is an identifier can be a reference to a type
 name or a type variable}
 @defform[(Rec n t)]{is a recursive type where @scheme[n] is bound to the