diff --git a/include/rtdebug.h b/include/rtdebug.h
index 2d93e88b94..8fd07b5b76 100644
--- a/include/rtdebug.h
+++ b/include/rtdebug.h
@@ -21,6 +21,8 @@
 #ifndef __RTDEBUG_H__
 #define __RTDEBUG_H__
 
+#include <rtconfig.h>
+
 /* Using this macro to control all kernel debug features. */
 #ifdef RT_DEBUG