diff --git a/master.cfg b/master.cfg
index 41ef5d8..855dbe9 100644
--- a/master.cfg
+++ b/master.cfg
@@ -14,7 +14,7 @@ from buildbot.schedulers.basic import SingleBranchScheduler, AnyBranchScheduler
 from buildbot.schedulers.timed import Nightly
 from buildbot.schedulers.forcesched import ForceScheduler
 from buildbot.process import factory
-from buildbot.process.properties import WithProperties
+from buildbot.process.properties import WithProperties, Property
 from buildbot.steps.shell import Compile
 from buildbot.steps.shell import Configure
 from buildbot.steps.shell import ShellCommand