diff --git a/basis/tools/deploy/shaker/strip-ui-error-hook.factor b/basis/tools/deploy/shaker/strip-ui-error-hook.factor
index 664a658ee0..7f661feeb2 100644
--- a/basis/tools/deploy/shaker/strip-ui-error-hook.factor
+++ b/basis/tools/deploy/shaker/strip-ui-error-hook.factor
@@ -1,5 +1,5 @@
 USING: continuations namespaces sequences kernel ui
-ui.gadgets.worlds ;
+ui.gadgets.worlds system ;
 
 [
     "Error"