diff --git a/os_brick/initiator/connector.py b/os_brick/initiator/connector.py
index 55d6af239..3187be178 100644
--- a/os_brick/initiator/connector.py
+++ b/os_brick/initiator/connector.py
@@ -2508,6 +2508,7 @@ class ScaleIOConnector(InitiatorConnector):
                        'path': self.volume_path}
         return device_info
 
+    @lockutils.synchronized('scaleio', 'scaleio-')
     def connect_volume(self, connection_properties):
         """Connect the volume.
 
@@ -2636,6 +2637,7 @@ class ScaleIOConnector(InitiatorConnector):
 
         return device_info
 
+    @lockutils.synchronized('scaleio', 'scaleio-')
     def disconnect_volume(self, connection_properties, device_info):
         """Disconnect the ScaleIO volume.