diff --git a/src/app/components/toolbar/toggle-info-drawer/toggle-info-drawer.component.ts b/src/app/components/toolbar/toggle-info-drawer/toggle-info-drawer.component.ts
index 21a8a9ed2..91022798b 100644
--- a/src/app/components/toolbar/toggle-info-drawer/toggle-info-drawer.component.ts
+++ b/src/app/components/toolbar/toggle-info-drawer/toggle-info-drawer.component.ts
@@ -38,6 +38,7 @@ import {
       mat-icon-button
       [color]="(infoDrawerOpened$ | async) ? 'primary' : ''"
       [attr.aria-label]="'APP.ACTIONS.DETAILS' | translate"
+      [attr.aria-expanded]="infoDrawerOpened$ | async"
       [attr.title]="'APP.ACTIONS.DETAILS' | translate"
       (click)="onClick()"
     >