diff --git a/extra/ui/tools/interactor/interactor.factor b/extra/ui/tools/interactor/interactor.factor
index c28e8aec7c..400169908b 100755
--- a/extra/ui/tools/interactor/interactor.factor
+++ b/extra/ui/tools/interactor/interactor.factor
@@ -6,7 +6,7 @@ models namespaces parser prettyprint quotations sequences
 strings threads listener classes.tuple ui.commands ui.gadgets
 ui.gadgets.editors ui.gadgets.presentations ui.gadgets.worlds
 ui.gestures definitions calendar concurrency.flags
-concurrency.mailboxes ui.tools.workspace accessors ;
+concurrency.mailboxes ui.tools.workspace accessors sets ;
 IN: ui.tools.interactor
 
 ! If waiting is t, we're waiting for user input, and invoking