diff --git a/media/css/reader.css b/media/css/reader.css
index b99f496da..b207939ca 100644
--- a/media/css/reader.css
+++ b/media/css/reader.css
@@ -132,7 +132,8 @@ a img {
 
 .right-pane {
     display: none;
-    overflow: auto !important;
+    overflow-y: auto !important;
+    overflow-x: hidden !important;
 }
 
 /* ============= */