diff --git a/mysos/executor/executor.py b/mysos/executor/executor.py
index 1ffbb51..122bc36 100644
--- a/mysos/executor/executor.py
+++ b/mysos/executor/executor.py
@@ -126,7 +126,7 @@
   @logged
   def killTask(self, driver, taskId):
     # Killing the task also kills the executor because there is one task per executor.
-    log.info("Asked to kill task %s" % taskId)
+    log.info("Asked to kill task %s" % taskId.value)
     self._killed = True
     self._kill()