diff --git a/judge/views/problem.py b/judge/views/problem.py
index fce7d1d..807fcc2 100644
--- a/judge/views/problem.py
+++ b/judge/views/problem.py
@@ -765,7 +765,7 @@ class ProblemList(QueryStringSortMixin, TitleMixin, SolvedProblemMixin, ListView
         )
 
     def GET_with_session(self, request, key):
-        if not request.GET:
+        if not request.GET.get(key):
             return request.session.get(key, False)
         return request.GET.get(key, None) == "1"
 
@@ -843,11 +843,6 @@ class ProblemFeed(ProblemList, FeedView):
     title = _("Problem feed")
     feed_type = None
 
-    def GET_with_session(self, request, key):
-        if not request.GET:
-            return request.session.get(key, key == "hide_solved")
-        return request.GET.get(key, None) == "1"
-
     def get_comment_page(self, problem):
         return "p:%s" % problem.code