diff --git a/src/app/me/components/ProfileHeader.tsx b/src/app/me/components/ProfileHeader.tsx
index 5a4e275..46b67f8 100644
--- a/src/app/me/components/ProfileHeader.tsx
+++ b/src/app/me/components/ProfileHeader.tsx
@@ -157,7 +157,7 @@ export function ProfileHeader({
                   <Calendar className="size-3.5" />
                   <span>
                     {t("me.profile.joined")}{" "}
-                    {format(new Date(user.created_at), "MMM yyyy")}
+                    {user.created_at ? format(new Date(user.created_at), "MMM yyyy") : null}
                   </span>
                 </div>
                 {user.organization && (