diff --git a/_includes/base-header.html b/_includes/base-header.html
index 85d9a6e..76db13d 100644
--- a/_includes/base-header.html
+++ b/_includes/base-header.html
@@ -20,10 +20,10 @@
 
       document.getElementById('mobileToggleButton').setAttribute('aria-expanded', isOpen);
       document.getElementById('mobileToggleText').innerText = `${isOpen ? 'Close' : 'Open'} Navigation`;
-      document.getElementById(`mobileToggleIcon${isOpen ? 'Opened' : 'Closed'}`).classList.add('block');
-      document.getElementById(`mobileToggleIcon${isOpen ? 'Opened' : 'Closed'}`).classList.remove('hidden');
-      document.getElementById(`mobileToggleIcon${!isOpen ? 'Opened' : 'Closed'}`).classList.add('hidden');
-      document.getElementById(`mobileToggleIcon${!isOpen ? 'Opened' : 'Closed'}`).classList.remove('block');
+      document.getElementById('mobileToggleIconOpened').classList.add('block');
+      document.getElementById('mobileToggleIconOpened').classList.remove('hidden');
+      document.getElementById('mobileToggleIconClosed').classList.add('hidden');
+      document.getElementById('mobileToggleIconClosed').classList.remove('block');
       document.getElementById('mobileNavigation').classList.add(isOpen ? 'block' : 'hidden');
       document.getElementById('mobileNavigation').classList.remove(isOpen ? 'hidden' : 'block');
     }