diff --git a/basis/debugger/debugger-tests.factor b/basis/debugger/debugger-tests.factor
index 12b1f8d476..25b46c2fdb 100644
--- a/basis/debugger/debugger-tests.factor
+++ b/basis/debugger/debugger-tests.factor
@@ -1,4 +1,4 @@
-USING: debugger kernel continuations tools.test ;
+USING: alien.syntax debugger kernel continuations tools.test ;
 IN: debugger.tests
 
 [ ] [ [ drop ] [ error. ] recover ] unit-test