diff --git a/frontend/main.ts b/frontend/main.ts
index 1e1d7cb..dcea3f5 100644
--- a/frontend/main.ts
+++ b/frontend/main.ts
@@ -30,7 +30,7 @@ function initToggle() {
           sessionStorage.setItem('tripsFilter', JSON.stringify( Array.from(filterMap.entries())));
         }
         resetFilteredElements();
-        if(btn.ariaPressed === 'false'){
+        if(btn.getAttribute('aria-pressed') === 'false'){
           Array.prototype.forEach.call(btns, (b: HTMLButtonElement) => {
             b.setAttribute('aria-pressed', 'false'); 
           });