diff --git a/lib/task.cc b/lib/task.cc
index d58fe73..d7f0f1a 100644
--- a/lib/task.cc
+++ b/lib/task.cc
@@ -89,6 +89,7 @@ namespace crucible {
 
 		TaskState &operator=(const TaskState &) = delete;
 		TaskState(const TaskState &) = delete;
+		TaskState(TaskState &&) = delete;
 
 	public:
 		~TaskState();