diff --git a/src/js/auth/authStateListener.js b/src/js/auth/authStateListener.js
index 1ffa393..efe2d34 100644
--- a/src/js/auth/authStateListener.js
+++ b/src/js/auth/authStateListener.js
@@ -16,7 +16,10 @@ export const onAuthStateChangedListener = userNameDisplay => {
     if (user) {
       const displayName = user.displayName;
 
+      const userNameDisplayMobile = document.querySelector('#user-name-display-mobile');
+
       userNameDisplay.textContent = displayName;
+      userNameDisplayMobile.textContent = displayName;
       userProfile.classList.remove('hidden');
       userButton.classList.remove('hidden');
       signUpButton.classList.add('hidden');