diff --git a/django/contrib/gis/db/backend/oracle/__init__.py b/django/contrib/gis/db/backend/oracle/__init__.py
index 3eee56ea23..22402103fa 100644
--- a/django/contrib/gis/db/backend/oracle/__init__.py
+++ b/django/contrib/gis/db/backend/oracle/__init__.py
@@ -12,6 +12,7 @@ SpatialBackend = BaseSpatialBackend(name='oracle', oracle=True,
                                     difference=DIFFERENCE,
                                     distance=DISTANCE,
                                     distance_functions=DISTANCE_FUNCTIONS,
+                                    extent=EXTENT,
                                     gis_terms=ORACLE_SPATIAL_TERMS,
                                     gml=ASGML,
                                     intersection=INTERSECTION,