diff --git a/app/src/main/cpp/GPIOControl.h b/app/src/main/cpp/GPIOControl.h
index 59d696be..841281a8 100644
--- a/app/src/main/cpp/GPIOControl.h
+++ b/app/src/main/cpp/GPIOControl.h
@@ -74,7 +74,7 @@
 
 #define CMD_SET_485_ENABLE                      512
 #define CMD_SET_3V3_PWR_EN                      516
-#define                     517
+#define CMD_SET_5V_PWR_ENABLE                   517
 #define CMD_SET_SENSOR_ENABLE                   504
 #define CMD_SET_SENSOR_PWR_ENABLE               505
 #define CMD_SET_SENSOR2_ENABLE                  506