diff --git a/doc/23.CMSIS_RTOS_API_Use_Guide.md b/doc/23.CMSIS_RTOS_API_Use_Guide.md
index 0402bf8f5ea0ec95d2547e378f8880abb784b376..2f1cf529edfb3891c3e6e7ce51d50a000b3c9a1f 100644
--- a/doc/23.CMSIS_RTOS_API_Use_Guide.md
+++ b/doc/23.CMSIS_RTOS_API_Use_Guide.md
@@ -182,7 +182,7 @@ typedef enum {
     osPriorityError         =  0x84        ///< system cannot determine priority or thread has illegal priority
 } osPriority;
 ```
-在TecentOS-tiny中实现的时候进行了转化：
+在TencentOS-tiny中实现的时候进行了转化：
 ```c
 static k_prio_t priority_cmsis2knl(osPriority prio)
 {