diff --git a/HISTORY b/HISTORY
index 031dcd2..44463d2 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,6 +1,5 @@
 
 Version 1.66  2023-02-12
-  * struct fast_task_info add field: nio_stages.next for epoll edge trigger
   * struct fast_task_info add field: notify_next for nio notify queue
 
 Version 1.65  2023-01-09
diff --git a/src/fast_task_queue.h b/src/fast_task_queue.h
index 813b14c..bebeafe 100644
--- a/src/fast_task_queue.h
+++ b/src/fast_task_queue.h
@@ -100,7 +100,6 @@ struct fast_task_info
     struct {
         uint8_t current;
         volatile uint8_t notify;
-        volatile uint8_t next;
     } nio_stages; //stages for network IO
     volatile int8_t reffer_count;
     volatile int8_t canceled;  //if task canceled