diff --git a/django/contrib/gis/db/models/sql/aggregates.py b/django/contrib/gis/db/models/sql/aggregates.py
index f8f3ed1eb45..5a2e5d07bef 100644
--- a/django/contrib/gis/db/models/sql/aggregates.py
+++ b/django/contrib/gis/db/models/sql/aggregates.py
@@ -1,7 +1,9 @@
-from django.db.models.sql.aggregates import Aggregate
+from django.db.models.sql.aggregates import Aggregate, Count
 from django.contrib.gis.db.models.fields import GeometryField
 
 
+__all__ = ['Count', 'Collect', 'Extent', 'Extent3D', 'MakeLine', 'Union']
+
 class GeoAggregate(Aggregate):
     # Default SQL template for spatial aggregates.
     sql_template = '%(function)s(%(field)s)'