diff --git a/master/buildbot/process/buildstep.py b/master/buildbot/process/buildstep.py
index 89bfa488df2..638065345c9 100644
--- a/master/buildbot/process/buildstep.py
+++ b/master/buildbot/process/buildstep.py
@@ -389,12 +389,25 @@ def start(self):
         raise NotImplementedError("your subclass must implement run()")
 
     def interrupt(self, reason):
+        # TODO: consider adding an INTERRUPTED or STOPPED status to use
+        # instead of FAILURE, might make the text a bit more clear.
+        # 'reason' can be a Failure, or text
         self.stopped = True
         if self._acquiringLock:
             lock, access, d = self._acquiringLock
             lock.stopWaitingUntilAvailable(self, access, d)
             d.callback(None)
 
+        if self._step_status.isWaitingForLocks():
+            self.addCompleteLog(
+                'interrupt while waiting for locks', str(reason))
+        else:
+            self.addCompleteLog('interrupt', str(reason))
+
+        if self.cmd:
+            d = self.cmd.interrupt(reason)
+            d.addErrback(log.err, 'while interrupting command')
+
     def releaseLocks(self):
         log.msg("releaseLocks(%s): %s" % (self, self.locks))
         for lock, access in self.locks:
@@ -683,21 +696,6 @@ def setupLogfiles(self, cmd, logfiles):
                 # and tell the RemoteCommand to feed it
                 cmd.useLog(newlog, True)
 
-    def interrupt(self, reason):
-        # TODO: consider adding an INTERRUPTED or STOPPED status to use
-        # instead of FAILURE, might make the text a bit more clear.
-        # 'reason' can be a Failure, or text
-        BuildStep.interrupt(self, reason)
-        if self._step_status.isWaitingForLocks():
-            self.addCompleteLog(
-                'interrupt while waiting for locks', str(reason))
-        else:
-            self.addCompleteLog('interrupt', str(reason))
-
-        if self.cmd:
-            d = self.cmd.interrupt(reason)
-            d.addErrback(log.err, 'while interrupting command')
-
     def checkDisconnect(self, f):
         # this is now handled by self.failed
         log.msg("WARNING: step %s uses deprecated checkDisconnect method")