diff --git a/lisp/textmodes/tex-mode.el b/lisp/textmodes/tex-mode.el
index b4ec3fe86cf..7f1035251e6 100644
--- a/lisp/textmodes/tex-mode.el
+++ b/lisp/textmodes/tex-mode.el
@@ -36,6 +36,9 @@
   (require 'cl)
   (require 'skeleton))
 
+(defvar font-lock-comment-face)
+(defvar font-lock-doc-face)
+
 (require 'shell)
 (require 'compile)