diff --git a/doc/lisp_reference/all-functions.lisp b/doc/lisp_reference/all-functions.lisp
new file mode 100644
index 0000000..0659c3d
--- /dev/null
+++ b/doc/lisp_reference/all-functions.lisp
@@ -0,0 +1,5 @@
+;; Prints all defined Lisp functions
+(defun main ()
+  (mapcar (lambda (fun)
+			(print fun))
+		  (env-functions +current-env+)))