diff --git a/themes/quark-open-publishing/css/custom.css b/themes/quark-open-publishing/css/custom.css
index b277504a..eead76aa 100644
--- a/themes/quark-open-publishing/css/custom.css
+++ b/themes/quark-open-publishing/css/custom.css
@@ -36,6 +36,6 @@
 	color: #1d66bf;
 }
 
-#page-wrapper, header {
+#page-wrapper, #header {
     max-width: 1920px;
 }