diff --git a/social_core/backends/qq.py b/social_core/backends/qq.py
index b740b27a..18defe1c 100644
--- a/social_core/backends/qq.py
+++ b/social_core/backends/qq.py
@@ -12,7 +12,7 @@
 
 class QQOAuth2(BaseOAuth2):
     name = 'qq'
-    ID_KEY = 'openid'
+    ID_KEY = 'unionid'
     AUTHORIZE_URL = 'https://graph.qq.com/oauth2.0/authorize'
     ACCESS_TOKEN_URL = 'https://graph.qq.com/oauth2.0/token'
     AUTHORIZATION_URL = 'https://graph.qq.com/oauth2.0/authorize'
@@ -48,11 +48,12 @@ def get_user_details(self, response):
 
     def get_openid(self, access_token):
         response = self.request(self.OPENID_URL, params={
-            'access_token': access_token
+            'access_token': access_token,
+            'unionid': '1'
         })
         content = response.content.decode()
         data = json.loads(content[10:-3])
-        return data['openid']
+        return data['unionid']
 
     def user_data(self, access_token, *args, **kwargs):
         openid = self.get_openid(access_token)
@@ -63,7 +64,7 @@ def user_data(self, access_token, *args, **kwargs):
                 'openid': openid
             }
         )
-        response['openid'] = openid
+        response['unionid'] = openid
         return response
 
     def request_access_token(self, url, data, *args, **kwargs):