diff --git a/django/contrib/gis/db/models/sql/query.py b/django/contrib/gis/db/models/sql/query.py
index 52f521d..d38045e 100644
--- a/django/contrib/gis/db/models/sql/query.py
+++ b/django/contrib/gis/db/models/sql/query.py
@@ -78,14 +78,25 @@ class GeoQuery(sql.Query):
                         col_aliases.add(col[1])
                 else:
                     result.append(col.as_sql(quote_func=qn))
+                   
                     if hasattr(col, 'alias'):
                         aliases.add(col.alias)
                         col_aliases.add(col.alias)
+
         elif self.default_cols:
             cols, new_aliases = self.get_default_columns(with_aliases,
                     col_aliases)
             result.extend(cols)
             aliases.update(new_aliases)
+
+        result.extend([
+                '%s%s' % (
+                    aggregate.as_sql(quote_func=qn),
+                    alias is not None and ' AS %s' % alias or ''
+                    )
+                for alias, aggregate in self.aggregate_select.items()
+                ])
+
         # This loop customized for GeoQuery.
         if not self.aggregate:
             for (table, col), field in izip(self.related_select_cols, self.related_select_fields):