diff --git a/accounts/models.py b/accounts/models.py
index 7b5b775..b97897f 100644
--- a/accounts/models.py
+++ b/accounts/models.py
@@ -92,12 +92,16 @@ class Participation(PonyConfModel):
         return self.orga
 
     def is_staff(self):
-        return self.is_orga() or self.topic_set.exists()
+        return self.is_orga() or self.topic_set.exists() or self.track_set.exists()
 
     @property
     def topic_set(self):
         return self.user.topic_set.filter(site=self.site)
 
+    @property
+    def track_set(self):
+        return self.user.track_set.filter(site=self.site)
+
     @property
     def talk_set(self):
         return self.user.talk_set.filter(site=self.site)
diff --git a/proposals/models.py b/proposals/models.py
index 491bc5e..efee091 100644
--- a/proposals/models.py
+++ b/proposals/models.py
@@ -135,9 +135,9 @@ class Talk(PonyConfModel):
             return False
         if participation.orga:
             return True
-        if self.topics.filter(reviewers=participation.user).exists():
+        if self.topics.filter(reviewers=user).exists():
             return True
-        if self.track and self.track.managers.filter(user=participation.user).exists():
+        if self.track and user in self.track.managers.all():
             return True
         return False