diff --git a/basis/ui/ui-docs.factor b/basis/ui/ui-docs.factor
index b2f97857f6..64eb5db07e 100644
--- a/basis/ui/ui-docs.factor
+++ b/basis/ui/ui-docs.factor
@@ -73,10 +73,10 @@ HELP: raise-window
 { $description "Makes the native window containing the given gadget the front-most window." } ;
 
 HELP: with-ui
-{ $values { "quot" quotation } }
-{ $description "Calls the quotation, starting the UI first if necessary." }
-{ $notes "This combinator should be used in the " { $link POSTPONE: MAIN: } " word of a vocabulary, in order for the vocabulary to work when run from the UI listener (" { $snippet "\"my-app\" run" } " and the command line (" { $snippet "./factor -run=my-app" } ")." }
-{ $examples "The " { $vocab-link "hello-ui" } " vocabulary implements a simple UI application which uses this combinator." } ;
+{ $values { "quot" { $quotation "( -- )" } } }
+{ $description "Calls the quotation, starting the UI first if necessary. If the UI is started, this word does not return." }
+{ $notes "This word should be used in the " { $link POSTPONE: MAIN: } " word of an application that uses the UI in order for the vocabulary to work when run from either the UI listener (" { $snippet "\"my-app\" run" } " and the command line (" { $snippet "./factor -run=my-app" } ")." }
+{ $examples "The " { $vocab-link "hello-ui" } " vocabulary implements a simple UI application which uses this word." } ;
 
 HELP: beep
 { $description "Plays the system beep sound." } ;
diff --git a/basis/ui/ui.factor b/basis/ui/ui.factor
index d55d1af096..1e5af88ac8 100644
--- a/basis/ui/ui.factor
+++ b/basis/ui/ui.factor
@@ -207,7 +207,7 @@ M: object close-window
     <flag> ui-notify-flag set-global
 ] "ui" add-startup-hook
 
-: with-ui ( quot -- )
+: with-ui ( quot: ( -- ) -- )
     ui-running? [ call( -- ) ] [ '[ init-ui @ ] (with-ui) ] if ;
 
 HOOK: beep ui-backend ( -- )