diff --git a/django/contrib/gis/db/models/query.py b/django/contrib/gis/db/models/query.py
index b994252002..2a8de4cde3 100644
--- a/django/contrib/gis/db/models/query.py
+++ b/django/contrib/gis/db/models/query.py
@@ -194,9 +194,9 @@ class GeoQuerySet(QuerySet):
             # PostGIS AsGML() aggregate function parameter order depends on the
             # version -- uggh.
             if backend.spatial_version > (1, 3, 1):
-                procedure_fmt = '%(version)s,%(geo_col)s,%(precision)s'
+                s['procedure_fmt'] = '%(version)s,%(geo_col)s,%(precision)s'
             else:
-                procedure_fmt = '%(geo_col)s,%(precision)s,%(version)s'
+                s['procedure_fmt'] = '%(geo_col)s,%(precision)s,%(version)s'
             s['procedure_args'] = {'precision' : precision, 'version' : version}
 
         return self._spatial_attribute('gml', s, **kwargs)
diff --git a/django/contrib/gis/tests/geoapp/tests.py b/django/contrib/gis/tests/geoapp/tests.py
index 952ac9d45b..7d8121425a 100644
--- a/django/contrib/gis/tests/geoapp/tests.py
+++ b/django/contrib/gis/tests/geoapp/tests.py
@@ -529,6 +529,9 @@ class GeoQuerySetTest(TestCase):
         for ptown in [ptown1, ptown2]:
             self.assertTrue(gml_regex.match(ptown.gml))
 
+        if postgis:
+            self.assertIn('<gml:pos srsDimension="2">', City.objects.gml(version=3).get(name='Pueblo').gml)
+
     def test_kml(self):
         "Testing KML output from the database using GeoQuerySet.kml()."
         # Only PostGIS and Spatialite (>=2.4.0-RC4) support KML serialization