diff --git a/golem_messages/message/tasks.py b/golem_messages/message/tasks.py
index 539437f..7ddc479 100644
--- a/golem_messages/message/tasks.py
+++ b/golem_messages/message/tasks.py
@@ -740,6 +740,7 @@ class CannotComputeTask(TaskMessage, base.AbstractReasonMessage):
     ] + base.AbstractReasonMessage.__slots__
 
     class REASON(datastructures.StringEnum):
+        CannotTakeWork = enum.auto()
         WrongCTD = enum.auto()
         WrongKey = enum.auto()
         WrongAddress = enum.auto()