diff --git a/modules/lang/org/config.el b/modules/lang/org/config.el
index 7a14529dc..6f57f0474 100644
--- a/modules/lang/org/config.el
+++ b/modules/lang/org/config.el
@@ -230,10 +230,10 @@ Also adds support for a `:sync' parameter to override `:async'."
       (let* ((info (or info (org-babel-get-src-block-info)))
              (params (org-babel-merge-params (nth 2 info) params)))
         (cond ((or (assq :sync params)
-                   (not (assq :async params)))
+                   (not (assq :async params))
+                   (member (car info) org-babel-async-language-blacklist))
                (funcall fn arg info params))
               ((not (member (cdr (assq :session params)) '("none" nil)))
-               (message "Org babel :: :session is incompatible with :async. Executing synchronously!")
                nil)
               ((funcall orig-fn fn arg info params))))))