diff --git a/src/mempool.c b/src/mempool.c
index c9bcd7a45c..05904bfbc7 100644
--- a/src/mempool.c
+++ b/src/mempool.c
@@ -356,6 +356,8 @@ void *rt_mp_alloc(rt_mp_t mp, rt_int32_t time)
             /* get current thread */
             thread = rt_thread_self();
 
+            thread->error = RT_EOK;
+
             /* need suspend thread */
             rt_thread_suspend(thread);
             rt_list_insert_after(&(mp->suspend_thread), &(thread->tlist));