diff --git a/mod/book/tool/print/print.css b/mod/book/tool/print/print.css
index 90d7153d30e..2d40ca1ca51 100644
--- a/mod/book/tool/print/print.css
+++ b/mod/book/tool/print/print.css
@@ -1,4 +1,4 @@
-
+/*csslint important:false */
 #page-mod-book-print {
     color: #000;
     background-color: #fff;