diff --git a/collects/scribblings/framework/color.scrbl b/collects/scribblings/framework/color.scrbl
index 067c6bb05b..cfc1ef6e50 100644
--- a/collects/scribblings/framework/color.scrbl
+++ b/collects/scribblings/framework/color.scrbl
@@ -207,7 +207,7 @@
     be inserted, even if it is not the right kind.  If @racket[flash?] is true,
     the matching open parenthesis will be flashed.
   }
-  @defmethod*[(((classify-position (position exact-nonnegative-integer?)) symbol?))]{
+  @defmethod*[(((classify-position (position exact-nonnegative-integer?)) (or/c symbol? #f)))]{
 
     Return a symbol for the lexer-determined token type for the token that
     contains the item after @racket[position].
diff --git a/collects/scribblings/framework/scheme.scrbl b/collects/scribblings/framework/scheme.scrbl
index 4a822f9009..da1b48cdd8 100644
--- a/collects/scribblings/framework/scheme.scrbl
+++ b/collects/scribblings/framework/scheme.scrbl
@@ -67,12 +67,13 @@
   }
 
   @defmethod*[(((tabify (start-pos exact-integer?
-                                   (send this text get-start-position)))
+                                   (send this get-start-position)))
                 void?))]{
     Tabs the line containing by @racket[start-pos]
   }
 
-  @defmethod*[(((tabify-selection (start exact-integer?) (end exact-integer?))
+  @defmethod*[(((tabify-selection (start exact-integer? (send this get-start-position))
+                                  (end exact-integer? (send this get-end-position)))
                 void?))]{
     Sets the tabbing for the lines containing positions @racket[start]
     through @racket[end].