diff --git a/src/kservice.c b/src/kservice.c
index 12878e67d14bc9ab582a8be04a9711baa69c9a2f..fef284e8af06ae49c0a51e42989fa739d39cac0e 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -1114,11 +1114,11 @@ void rt_kprintf(const char *fmt, ...)
     }
     else
     {
-        rt_uint16_t old_flag = _console_device->flag;
+        rt_uint16_t old_flag = _console_device->open_flag;
 
-        _console_device->flag |= RT_DEVICE_FLAG_STREAM;
+        _console_device->open_flag |= RT_DEVICE_FLAG_STREAM;
         rt_device_write(_console_device, 0, rt_log_buf, length);
-        _console_device->flag = old_flag;
+        _console_device->open_flag = old_flag;
     }
 #else
     rt_hw_console_output(rt_log_buf);