diff --git a/modules/siren-markdown.el b/modules/siren-markdown.el
index d9ffd4d..989e8f5 100644
--- a/modules/siren-markdown.el
+++ b/modules/siren-markdown.el
@@ -33,7 +33,7 @@
 
 (add-hook 'markdown-mode-hook (lambda () (run-hooks 'siren-markdown-mode-hook)))
 
-custom-set-faces
+(custom-set-faces
  '(markdown-code-face ((t nil))))
 
 (provide 'siren-markdown)