diff --git a/collects/scribblings/scribble/basic.scrbl b/collects/scribblings/scribble/basic.scrbl
index cc26e22f..1ccdf871 100644
--- a/collects/scribblings/scribble/basic.scrbl
+++ b/collects/scribblings/scribble/basic.scrbl
@@ -150,7 +150,7 @@ an element with style @scheme[#f].}
 @def-style-proc[subscript]
 @def-style-proc[superscript]
 
-@defproc[(hspace [n nonnegative-exact-integer?]) element?]{
+@defproc[(hspace [n exact-nonnegative-integer?]) element?]{
 
 Produces an element containing @scheme[n] spaces and style
 @scheme['hspace].}
diff --git a/collects/scribblings/scribble/struct.scrbl b/collects/scribblings/scribble/struct.scrbl
index 7096bfda..48d4136d 100644
--- a/collects/scribblings/scribble/struct.scrbl
+++ b/collects/scribblings/scribble/struct.scrbl
@@ -689,14 +689,14 @@ Like @scheme[content->string], but for a single @tech{element}.
 
 }
 
-@defproc[(element-width (element any/c)) nonnegative-exact-integer?]{
+@defproc[(element-width (element any/c)) exact-nonnegative-integer?]{
 
 Returns the width in characters of the given @tech{element}.
 
 }
 
 
-@defproc[(block-width (e block?)) nonnegative-exact-integer?]{
+@defproc[(block-width (e block?)) exact-nonnegative-integer?]{
 
 Returns the width in characters of the given @tech{block}.}