diff --git a/ArduSub/GCS_Mavlink.cpp b/ArduSub/GCS_Mavlink.cpp
index 7c1e6ff7f2..b1751e285b 100644
--- a/ArduSub/GCS_Mavlink.cpp
+++ b/ArduSub/GCS_Mavlink.cpp
@@ -519,11 +519,6 @@ bool GCS_MAVLINK_Sub::try_send_message(enum ap_message id)
         sub.send_vfr_hud(chan);
         break;
 
-    case MSG_RAW_IMU1:
-        CHECK_PAYLOAD_SIZE(RAW_IMU);
-        send_raw_imu(sub.ins, sub.compass);
-        break;
-
     case MSG_RAW_IMU2:
         CHECK_PAYLOAD_SIZE(SCALED_PRESSURE);
         send_scaled_pressure();