Index: buildbot/scripts/logwatcher.py
--- buildbot/scripts/logwatcher.py.orig
+++ buildbot/scripts/logwatcher.py
@@ -113,7 +113,7 @@ class LogWatcher(LineOnlyLongLineReceiver):
         else:
             tailBin = "/usr/bin/tail"
 
-        args = ("tail", "-F", "-n", "0", self.logfile)
+        args = ("tail", "-f", "-n", "0", self.logfile)
         self.p = self._reactor.spawnProcess(self.pp, tailBin, args, env=os.environ)
         self.running = True
         d = defer.maybeDeferred(self._start)
