diff --git a/ciel.asd b/ciel.asd
index 5ae1529..7b36121 100644
--- a/ciel.asd
+++ b/ciel.asd
@@ -75,6 +75,8 @@
                ;; tests
                :fiveam
 
+               :which
+
                ;; debugging, developer utilities
                :log4cl
                :printv