diff --git a/contrib/concurrency/concurrency-examples.factor b/contrib/concurrency/concurrency-examples.factor
index 279141ddc0..705a8492a7 100644
--- a/contrib/concurrency/concurrency-examples.factor
+++ b/contrib/concurrency/concurrency-examples.factor
@@ -158,6 +158,7 @@ M: crash-command run-rpc-command ( command -- shutdown? result )
 USE: gadgets
 USE: gadgets-labels
 USE: gadgets-presentations
+USE: gadgets-layouts
 USE: generic
 
 TUPLE: promised-label promise ;