diff --git a/cm_backtrace/cm_backtrace.c b/cm_backtrace/cm_backtrace.c
index a3d9b73..d2b3f6c 100644
--- a/cm_backtrace/cm_backtrace.c
+++ b/cm_backtrace/cm_backtrace.c
@@ -208,9 +208,9 @@ static void get_cur_thread_stack_info(uint32_t sp, uint32_t *start_addr, size_t
     *start_addr = (uint32_t)vTaskStackAddr();
     *size = vTaskStackSize() * sizeof( StackType_t );
 #elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_RTX5)
-	osRtxThread_t *thread = osRtxInfo.thread.run.curr;
-	*start_addr = (uint32_t)thread->stack_mem;
-	*size = thread->stack_size;
+    osRtxThread_t *thread = osRtxInfo.thread.run.curr;
+    *start_addr = (uint32_t)thread->stack_mem;
+    *size = thread->stack_size;
 #endif
 }
 
@@ -236,8 +236,8 @@ static const char *get_cur_thread_name(void) {
 #elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_FREERTOS)
     return vTaskName();
 #elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_RTX5)
-	osThreadId_t id = osThreadGetId();
-	return osThreadGetName(id);
+    osThreadId_t id = osThreadGetId();
+    return osThreadGetName(id);
 #endif
 }
 
@@ -378,9 +378,8 @@ static void print_call_stack(uint32_t sp) {
     }
 
     if (cur_depth) {
-		call_stack_info[cur_depth * (8 + 1) - 1] = '\0';
-        cmb_println(print_info[PRINT_CALL_STACK_INFO], fw_name, CMB_ELF_FILE_EXTENSION_NAME,
-                call_stack_info);
+        call_stack_info[cur_depth * (8 + 1) - 1] = '\0';
+        cmb_println(print_info[PRINT_CALL_STACK_INFO], fw_name, CMB_ELF_FILE_EXTENSION_NAME, call_stack_info);
     } else {
         cmb_println(print_info[PRINT_CALL_STACK_ERR]);
     }