diff --git a/coolamqp/exceptions.py b/coolamqp/exceptions.py
index 18388eefba4b3c0df7b6df0065c73993606bf8c5..8bee7fd14e36faa0066bddddd2ce47ab12406de8 100644
--- a/coolamqp/exceptions.py
+++ b/coolamqp/exceptions.py
@@ -1,7 +1,7 @@
 # coding=UTF-8
 from __future__ import absolute_import, division, print_function
 
-from coolamqp.framing.definitions import HARD_ERRORS
+from coolamqp.framing.definitions import HARD_ERRORS, RESOURCE_LOCKED
 
 
 class CoolAMQPError(Exception):