diff --git a/libraries/AP_Mount/AP_Mount_Xacti.cpp b/libraries/AP_Mount/AP_Mount_Xacti.cpp
index 62ec3396a3e4a9..100d2d37d8cd9b 100644
--- a/libraries/AP_Mount/AP_Mount_Xacti.cpp
+++ b/libraries/AP_Mount/AP_Mount_Xacti.cpp
@@ -231,7 +231,8 @@ void AP_Mount_Xacti::send_camera_information(mavlink_channel_t chan) const
         0,                      // lens_id uint8_t
         flags,                  // flags uint32_t (CAMERA_CAP_FLAGS)
         0,                      // cam_definition_version uint16_t
-        cam_definition_uri);    // cam_definition_uri char[140]
+        cam_definition_uri,     // cam_definition_uri char[140]
+        _instance + 1);         // gimbal_device_id uint8_t
 }
 
 // send camera settings message to GCS