diff --git a/components/iar_tls/los_iar_tls.h b/components/iar_tls/los_iar_tls.h
index 07d287d6..89873fd1 100644
--- a/components/iar_tls/los_iar_tls.h
+++ b/components/iar_tls/los_iar_tls.h
@@ -32,7 +32,7 @@
 #include "los_compiler.h"
 
 /* Using task extended field to realize IAR TLS function in target_config.h include this header file. */
-#define LOSCFG_TASK_STRUCT_EXTENSION    VOID *iarTlsArea;
+#define LOSCFG_TASK_STRUCT_EXTENSION    VOID *iarTlsArea
 
 #if (__VER__ < 8000000)
 #include <yvals.h>
diff --git a/kernel/include/los_config.h b/kernel/include/los_config.h
index 9b4c01a3..53baffd6 100644
--- a/kernel/include/los_config.h
+++ b/kernel/include/los_config.h
@@ -638,10 +638,8 @@ extern UINT8 *m_aucSysMem0;
 /**
  * @ingroup los_config
  * Task extension field additional functions, such as IAR TLS.
+ * Please Use the LOSCFG_TASK_STRUCT_EXTENSION macro to define your task extended fields in target_config.h
  */
-#ifndef LOSCFG_TASK_STRUCT_EXTENSION
-#define LOSCFG_TASK_STRUCT_EXTENSION
-#endif
 #ifndef LOSCFG_TASK_CREATE_EXTENSION_HOOK
 #define LOSCFG_TASK_CREATE_EXTENSION_HOOK(taskCB)
 #endif
diff --git a/kernel/include/los_task.h b/kernel/include/los_task.h
index ce8441df..1560a27e 100644
--- a/kernel/include/los_task.h
+++ b/kernel/include/los_task.h
@@ -1500,7 +1500,9 @@ typedef struct {
 #if (LOSCFG_KERNEL_SIGNAL == 1)
     VOID                        *sig;                     /**< Task signal */
 #endif
-    LOSCFG_TASK_STRUCT_EXTENSION                          /**< Task extension field */
+#ifdef LOSCFG_TASK_STRUCT_EXTENSION
+    LOSCFG_TASK_STRUCT_EXTENSION;                         /**< Task extension field */
+#endif
 } LosTaskCB;
 
 STATIC INLINE BOOL OsTaskIsExit(const LosTaskCB *taskCB)