diff --git a/include/sbts2050_header.h b/include/sbts2050_header.h
index b029783..75f6608 100644
--- a/include/sbts2050_header.h
+++ b/include/sbts2050_header.h
@@ -7,6 +7,8 @@
 
 #include <stdint.h>
 
+#define	RQT_SUCCESS	0
+
 enum sbts2050_ids_request {
 	SBTS2050_PWR_RQT = 0x00,
 	SBTS2050_PWR_STATUS = 0x01,