diff --git a/libraries/SRV_Channel/SRV_Channel_config.h b/libraries/SRV_Channel/SRV_Channel_config.h
index 8f9022127ce..3d20e72d2c0 100644
--- a/libraries/SRV_Channel/SRV_Channel_config.h
+++ b/libraries/SRV_Channel/SRV_Channel_config.h
@@ -2,6 +2,10 @@
 
 #include <AP_HAL/AP_HAL_Boards.h>
 
+#ifndef AP_SRV_CHANNELS_ENABLED
+#define AP_SRV_CHANNELS_ENABLED 1
+#endif
+
 #ifndef NUM_SERVO_CHANNELS
     #if BOARD_FLASH_SIZE > 1024
         #define NUM_SERVO_CHANNELS 32