diff --git a/collects/lang/private/advanced-funs.rkt b/collects/lang/private/advanced-funs.rkt
index 49c76c5c51..e283d90469 100644
--- a/collects/lang/private/advanced-funs.rkt
+++ b/collects/lang/private/advanced-funs.rkt
@@ -79,8 +79,8 @@
     (void? (any -> boolean) "Determines if a value is void."))
    
    ("Posns"
-    (set-posn-x! (posn number -> void) "Updates the x component of a posn.")
-    (set-posn-y! (posn number -> void) "Updates the x component of a posn."))
+    (set-posn-x! (posn any -> void) "Updates the x component of a posn.")
+    (set-posn-y! (posn any -> void) "Updates the y component of a posn."))
    
    ("Vectors"
     (vector (X ... -> (vector X ...)) "Constructs a vector.")
diff --git a/collects/lang/private/beginner-funs.rkt b/collects/lang/private/beginner-funs.rkt
index f5570e0cfa..122db15218 100644
--- a/collects/lang/private/beginner-funs.rkt
+++ b/collects/lang/private/beginner-funs.rkt
@@ -315,10 +315,10 @@
 
     ("Posns"
       (posn signature "Signature for posns.")
-      (make-posn (number number -> posn) "Constructs a posn.")
-      (posn? (anything -> boolean) "Determines if its input is a posn.")
-      (posn-x (posn -> number) "Extracts the x component of a posn.")
-      (posn-y (posn -> number) "Extracts the y component of a posn."))
+      (make-posn (any any -> posn) "Constructs a posn from two arbitrary values.")
+      (posn? (any -> boolean) "Determines if its input is a posn.")
+      (posn-x (posn -> any) "Extracts the x component of a posn.")
+      (posn-y (posn -> any) "Extracts the y component of a posn."))
 
     ("Characters"
       (char? (any -> boolean)