diff --git a/ryu/app/ofctl/api.py b/ryu/app/ofctl/api.py
index d6485244..466b3314 100644
--- a/ryu/app/ofctl/api.py
+++ b/ryu/app/ofctl/api.py
@@ -19,7 +19,7 @@
 import numbers
 
 from ryu.base import app_manager
-import event
+from . import event
 
 
 def get_datapath(app, dpid):
diff --git a/ryu/app/ofctl/service.py b/ryu/app/ofctl/service.py
index 2e04c27d..0ca00c71 100644
--- a/ryu/app/ofctl/service.py
+++ b/ryu/app/ofctl/service.py
@@ -25,8 +25,8 @@ from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER,\
     DEAD_DISPATCHER
 from ryu.controller.handler import set_ev_cls
 
-import event
-import exception
+from . import event
+from . import exception
 
 
 class _SwitchInfo(object):