diff --git a/os/zthread.cpp b/os/zthread.cpp
index 6780c10..1064277 100644
--- a/os/zthread.cpp
+++ b/os/zthread.cpp
@@ -86,7 +86,7 @@ void ZThread::start(zosthread_cb_t cb, zosthread_cb_t exitcb) {
   xSemaphoreTake(m_lock, portMAX_DELAY);
   m_threadisworkingFlagCallSide = true;
   // xEventGroupSetBits(m_zthreadstartworkevent, 0x01);
-  while (m_status != kidle) {
+  while (m_status == kidle) {
     xTaskNotifyGive(m_defaultTaskHandle);
     vTaskDelay(1);
   }