diff --git a/apps/authentication/backends/openid/middleware.py b/apps/authentication/backends/openid/middleware.py
index df5ee93c1..75a752708 100644
--- a/apps/authentication/backends/openid/middleware.py
+++ b/apps/authentication/backends/openid/middleware.py
@@ -23,12 +23,15 @@ class OpenIDAuthenticationMiddleware(MiddlewareMixin):
     def process_request(self, request):
         # Don't need openid auth if AUTH_OPENID is False
         if not settings.AUTH_OPENID:
+            logger.info("Not settings.AUTH_OPENID")
             return
         # Don't need check single logout if user not authenticated
         if not request.user.is_authenticated:
+            logger.info("User is not authenticated")
             return
-        elif request.session[BACKEND_SESSION_KEY].endswith(
+        elif not request.session[BACKEND_SESSION_KEY].endswith(
                 BACKEND_OPENID_AUTH_CODE):
+            logger.info("BACKEND_SESSION_KEY is not BACKEND_OPENID_AUTH_CODE")
             return
 
         # Check openid user single logout or not with access_token