diff --git a/message_definitions/v1.0/common.xml b/message_definitions/v1.0/common.xml
index cfbe0197c8..b963df43cd 100644
--- a/message_definitions/v1.0/common.xml
+++ b/message_definitions/v1.0/common.xml
@@ -5419,6 +5419,11 @@
       <field type="uint32_t" name="dgps_age" units="ms">Age of DGPS info</field>
       <extensions/>
       <field type="uint16_t" name="yaw" units="cdeg">Yaw in earth frame from north. Use 0 if this GPS does not provide yaw. Use 65535 if this GPS is configured to provide yaw and is currently unable to provide it. Use 36000 for north.</field>
+      <field type="int32_t" name="alt_ellipsoid" units="mm">Altitude (above WGS84, EGM96 ellipsoid). Positive for up.</field>
+      <field type="uint32_t" name="h_acc" units="mm">Position uncertainty.</field>
+      <field type="uint32_t" name="v_acc" units="mm">Altitude uncertainty.</field>
+      <field type="uint32_t" name="vel_acc" units="mm">Speed uncertainty.</field>
+      <field type="uint32_t" name="hdg_acc" units="degE5">Heading / track uncertainty</field>
     </message>
     <message id="125" name="POWER_STATUS">
       <description>Power supply status</description>