diff --git a/apps/collection/models.py b/apps/collection/models.py
index 71fb2052..f57e7c86 100644
--- a/apps/collection/models.py
+++ b/apps/collection/models.py
@@ -28,9 +28,9 @@ class CollectionDateMixin(models.Model):
 class CollectionQuerySet(models.QuerySet):
     """QuerySet for model Collection"""
 
-    def by_country(self, country_id):
-        """Filter collection by country id."""
-        return self.filter(country=country_id)
+    def by_country(self, country):
+        """Filter collection by country."""
+        return self.filter(country=country)
 
     def published(self):
         """Returned only published collection"""