diff --git a/lisp/textmodes/reftex.el b/lisp/textmodes/reftex.el
index 8d0aa4bf80d..386f19f1797 100644
--- a/lisp/textmodes/reftex.el
+++ b/lisp/textmodes/reftex.el
@@ -2262,7 +2262,7 @@ IGNORE-WORDS List of words which should be removed from the string."
 
 (defun reftex-use-fonts ()
   ;; Return t if we can and want to use fonts.
-  (and window-system
+  (and ; window-system
        reftex-use-fonts
        (featurep 'font-lock)))