diff --git a/src/api.lisp b/src/api.lisp
index 6edbb08..9c75f67 100644
--- a/src/api.lisp
+++ b/src/api.lisp
@@ -152,7 +152,8 @@ Parameters here are meant to be already parsed, see parse-cli-optargs."
    then run, or a commands string that is then parsed and each command run."
 
   (with-monitor (:start-logger start-logger)
-    (let* ((funcs
+    (let* ((*print-circle* nil)
+           (funcs
             (typecase source
               (function (list source))