diff --git a/lib/tpl/dokuwiki/css/mobile.less b/lib/tpl/dokuwiki/css/mobile.less
index 289f5afa38cf84c41f5bd42fba9f88177b835bb3..0fbd0e8fe606bcd60e36578b3a3e64fe14611ea3 100644
--- a/lib/tpl/dokuwiki/css/mobile.less
+++ b/lib/tpl/dokuwiki/css/mobile.less
@@ -65,6 +65,15 @@
     margin-right: 0;
 }
 
+/* preview */
+.dokuwiki.hasSidebar div.preview {
+    border-right: none;
+}
+
+[dir=rtl] .dokuwiki.hasSidebar div.preview {
+    border-left: none;
+}
+
 /* toc */
 #dw__toc {
     float: none;