diff --git a/app/views.py b/app/views.py
index 71ebf7b..c67c3ec 100644
--- a/app/views.py
+++ b/app/views.py
@@ -71,6 +71,7 @@ def after_login(resp):
         nickname = resp.nickname
         if nickname is None or nickname == "":
             nickname = resp.email.split('@')[0]
+        nickname = User.make_unique_nickname(nickname)
         user = User(nickname = nickname, email = resp.email, role = ROLE_USER)
         db.session.add(user)
         db.session.commit()