diff --git a/ryu/cfg.py b/ryu/cfg.py
index 24959611..f2f05b44 100644
--- a/ryu/cfg.py
+++ b/ryu/cfg.py
@@ -43,6 +43,7 @@ from oslo.config.cfg import IntOpt
 from oslo.config.cfg import ListOpt
 from oslo.config.cfg import MultiStrOpt
 from oslo.config.cfg import StrOpt
+from oslo.config.cfg import FloatOpt
 
 from oslo.config.cfg import RequiredOptError
 from oslo.config.cfg import ConfigFilesNotFoundError