diff --git a/src/W800_SDK_v1.00.10/app/app_utils/app_utils.h b/src/W800_SDK_v1.00.10/app/app_utils/app_utils.h
index 6b93aae..f86d80b 100644
--- a/src/W800_SDK_v1.00.10/app/app_utils/app_utils.h
+++ b/src/W800_SDK_v1.00.10/app/app_utils/app_utils.h
@@ -3,6 +3,17 @@
 
 #include "wm_include.h"
 
+
+/**
+ * @brief Macro used to stringify the value of a define.
+ */
+#define STRINGIFY_VALUE(x) STRINGIFY(x)
+
+/**
+ * @brief Macro used to stringify a define.
+ */
+#define STRINGIFY(x) #x
+
 /**
  * @brief Wait for the specified time in micro seconds. This is a blocking function !
  *