diff --git a/scripts/qemu.py b/scripts/qemu.py
index 52cf09eebd64812ab73ec4278e5b9d3dc503b834..dcb4f0ffe6461f8bee49c6d29f0c839e00d633c5 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -150,12 +150,12 @@ class QEMUMachine(object):
             raise
 
     def is_running(self):
-        return self._popen is not None and self._popen.returncode is None
+        return self._popen is not None and self._popen.poll() is None
 
     def exitcode(self):
         if self._popen is None:
             return None
-        return self._popen.returncode
+        return self._popen.poll()
 
     def get_pid(self):
         if not self.is_running():