diff --git a/README.org b/README.org
index 6943eb2..eaebfa8 100644
--- a/README.org
+++ b/README.org
@@ -2350,7 +2350,19 @@ list detailing and motivating each listing:
 #+name: lst:setup-org-babel
 #+begin_src emacs-lisp -n
 (with-eval-after-load 'ob-core
-  (setopt org-confirm-babel-evaluate nil))
+  (setopt org-confirm-babel-evaluate nil)
+
+  (defun org-babel-execute:maxima (_body _params)
+    "NO-OP to silence warnings." t)
+
+  (defun org-babel-execute:racket (_body _params)
+    "NO-OP to silence warnings." t)
+
+  (defun org-babel-execute:scheme (_body _params)
+    "NO-OP to silence warnings." t)
+
+  (defun org-babel-execute:text (_body _params)
+    "NO-OP to silence warnings." t))
 
 (with-eval-after-load 'ob-latex
   (setopt