diff --git a/src/propeller/gp.cljc b/src/propeller/gp.cljc
index b721eda..318e457 100644
--- a/src/propeller/gp.cljc
+++ b/src/propeller/gp.cljc
@@ -39,6 +39,7 @@
 (defn cleanup
   []
   #?(:clj (shutdown-agents))
+  (prn {:run-completed true})
   nil)
 
 (defn gp-loop