diff --git a/seminar/models.py b/seminar/models.py
index ea81f791..dc79ae75 100644
--- a/seminar/models.py
+++ b/seminar/models.py
@@ -1119,7 +1119,7 @@ class Reseni(SeminarModelBase):
 		help_text='Udává, zda je řešení zveřejněno')
 
 	def verejne_url(self):
-		return str(reverse_lazy('odevzdavatko_detail_reseni', args=[self.object.id]))
+		return str(reverse_lazy('odevzdavatko_detail_reseni', args=[self.id]))
 
 	def absolute_url(self):
 		return "https://" + str(get_current_site(None)) + self.verejne_url()