diff --git a/src/kernel/Executor.h b/src/kernel/Executor.h
index e4306419..42e60be7 100644
--- a/src/kernel/Executor.h
+++ b/src/kernel/Executor.h
@@ -49,7 +49,7 @@ private:
 	virtual void handle(int state, int error) = 0;
 
 protected:
-	ExecQueue *get_queue() { return this->queue; }
+	ExecQueue *get_queue() const { return this->queue; }
 
 private:
 	ExecQueue *queue;