diff --git a/nova/virt/libvirt/volume/volume.py b/nova/virt/libvirt/volume/volume.py
index 6da1be5dc821..30c5498934c3 100644
--- a/nova/virt/libvirt/volume/volume.py
+++ b/nova/virt/libvirt/volume/volume.py
@@ -140,10 +140,10 @@ class LibvirtBaseVolumeDriver(object):
     def extend_volume(self, connection_info, instance, requested_size):
         """Extend the volume.
 
-        :param: connection_info: connection information about the volume
+        :param connection_info: connection information about the volume
             that has been extended.
-        :param: instance: instance connected to the newly extended volume.
-        :param: requested_size: new extended size (in bytes) for the volume to
+        :param instance: instance connected to the newly extended volume.
+        :param requested_size: new extended size (in bytes) for the volume to
             be extended.
 
         :returns: the new size to use when resizing the disk in QEMU.