diff --git a/ryu/services/protocols/bgp/api/all.py b/ryu/services/protocols/bgp/api/all.py
index 2cde697a..6ffe65ce 100644
--- a/ryu/services/protocols/bgp/api/all.py
+++ b/ryu/services/protocols/bgp/api/all.py
@@ -1,6 +1,9 @@
 # flake8: noqa
-import core
-import operator
-import prefix
-import rtconf
-import import_map
+
+from __future__ import absolute_import
+
+from . import core
+from . import operator
+from . import prefix
+from . import rtconf
+from . import import_map