diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
index 82581e0e5b..0ded52eb59 100644
--- a/nova/virt/libvirt/driver.py
+++ b/nova/virt/libvirt/driver.py
@@ -4710,7 +4710,7 @@ class LibvirtDriver(driver.ComputeDriver):
             if error_code == libvirt.VIR_ERR_NO_SUPPORT:
                 self._list_devices_supported = False
                 LOG.warn(_LW("URI %(uri)s does not support "
-                             "listDevices: " "%(error)s"),
+                             "listDevices: %(error)s"),
                              {'uri': self.uri(), 'error': ex})
                 return jsonutils.dumps([])
             else:
diff --git a/nova/virt/libvirt/host.py b/nova/virt/libvirt/host.py
index 31044ec146..af64a0d8ae 100644
--- a/nova/virt/libvirt/host.py
+++ b/nova/virt/libvirt/host.py
@@ -763,7 +763,7 @@ class Host(object):
                     error_code = ex.get_error_code()
                     if error_code == libvirt.VIR_ERR_NO_SUPPORT:
                         LOG.warn(_LW("URI %(uri)s does not support full set"
-                                     " of host capabilities: " "%(error)s"),
+                                     " of host capabilities: %(error)s"),
                                      {'uri': self._uri, 'error': ex})
                     else:
                         raise