diff --git a/APMrover2/GCS_Mavlink.cpp b/APMrover2/GCS_Mavlink.cpp
index fbfca43d91..312b7ad0a4 100644
--- a/APMrover2/GCS_Mavlink.cpp
+++ b/APMrover2/GCS_Mavlink.cpp
@@ -215,7 +215,7 @@ void Rover::send_location(mavlink_channel_t chan)
         fix_time,
         current_loc.lat,                   // in 1E7 degrees
         current_loc.lng,                   // in 1E7 degrees
-        gps.location().alt * 10UL,         // millimeters above sea level
+        current_loc.alt * 10UL,            // millimeters above sea level
         (current_loc.alt - home.alt) * 10, // millimeters above ground
         vel.x * 100,  // X speed cm/s (+ve North)
         vel.y * 100,  // Y speed cm/s (+ve East)