diff --git a/nginx_module/src/timer.rs b/nginx_module/src/timer.rs
index 5cf5417..86f44d5 100644
--- a/nginx_module/src/timer.rs
+++ b/nginx_module/src/timer.rs
@@ -20,7 +20,10 @@ impl<HandlerFn> Drop for Timer<HandlerFn> {
         }
 
         unsafe {
-            if self.event.timer_set() != 0 {
+            if self.event.timer_set() != 0
+                && ngx_quit == 0
+                && ngx_exiting == 0
+                && ngx_terminate == 0 {
                 ngx_event_del_timer(&mut *self.event.as_mut());
             }
         }