diff --git a/core/debugger/debugger-docs.factor b/core/debugger/debugger-docs.factor
index cb79597a73..3fbac64099 100755
--- a/core/debugger/debugger-docs.factor
+++ b/core/debugger/debugger-docs.factor
@@ -1,7 +1,7 @@
 USING: alien arrays generic generic.math help.markup help.syntax
 kernel math memory strings sbufs vectors io io.files classes
 help generic.standard continuations system debugger.private
-io.files.private ;
+io.files.private listener ;
 IN: debugger
 
 ARTICLE: "errors-assert" "Assertions"