diff --git a/frontend/express/public/javascripts/dom/slimScroll.min.js b/frontend/express/public/javascripts/dom/slimScroll.min.js
index 388c0a0fc17..b824d736832 100644
--- a/frontend/express/public/javascripts/dom/slimScroll.min.js
+++ b/frontend/express/public/javascripts/dom/slimScroll.min.js
@@ -199,7 +199,7 @@
                 var _onWheel = function(e)
                 {
                     // use mouse wheel only when mouse is over
-                    if (!isOverPanel) { return; }
+                    if (!isOverPanel || !me.is(":visible")) { return; }
 
                     var e = e || window.event;