diff --git a/front/core/components/popover/popover.js b/front/core/components/popover/popover.js
index 38f566135..0041a8413 100644
--- a/front/core/components/popover/popover.js
+++ b/front/core/components/popover/popover.js
@@ -77,8 +77,8 @@ export default class Popover extends Component {
         let isDescriptorMoreMenu = parent && parent.attributes[0].nodeValue == 'more-button';
         let leftMenu = this.document.querySelector('div[class="menu left"]');
         if (isDescriptorMoreMenu && leftMenu) {
+            let descriptorDiv = this.document.querySelector('vn-side-menu div[class="vn-descriptor"]');
             let leftMenuWidth = leftMenu.offsetWidth;
-            let descriptorDiv = this.document.querySelector('vn-side-menu div');
 
             let descriptorWidth = descriptorDiv.offsetWidth;
             this.scrollbarWidth = leftMenuWidth - descriptorWidth;