diff --git a/configuration.org b/configuration.org
index fffbd40..16f17d8 100644
--- a/configuration.org
+++ b/configuration.org
@@ -2041,7 +2041,7 @@ Automatically add spaces around operators.
   (add-hook 'c-mode-common-hook 'electric-operator-mode)
   ;; Apply electric-operator-mode to vala-mode, too
   (apply #'electric-operator-add-rules-for-mode 'vala-mode
-         electric-operator-prog-mode-rules))
+         (electric-operator-get-rules-for-mode 'prog-mode)))
 #+END_SRC
 
 ** Yasnippets