diff --git a/app/src/main/cpp/GPIOControl.h b/app/src/main/cpp/GPIOControl.h
index ec72dd9c..037e1a29 100644
--- a/app/src/main/cpp/GPIOControl.h
+++ b/app/src/main/cpp/GPIOControl.h
@@ -59,6 +59,8 @@
 
 #define CMD_SET_INIT_STATUS					    401
 
+#define CMD_SET_5V_PWR_ENABLE					517
+
 #else // defined(USING_PTZ)
 
 #define CMD_SET_OTG_STATE                       107