diff --git a/message_definitions/v1.0/ardupilotmega.xml b/message_definitions/v1.0/ardupilotmega.xml
index 73cc293540..0430986a19 100644
--- a/message_definitions/v1.0/ardupilotmega.xml
+++ b/message_definitions/v1.0/ardupilotmega.xml
@@ -998,6 +998,9 @@
       <entry value="512" name="EKF_PRED_POS_HORIZ_ABS">
         <description>Set if EKF's predicted horizontal position (absolute) estimate is good.</description>
       </entry>
+      <entry value="32768" name="EKF_GPS_GLITCHING">
+        <description>Set if EKF believes the GPS input data is faulty.</description>
+      </entry>
       <entry value="1024" name="EKF_UNINITIALIZED">
         <description>Set if EKF has never been healthy.</description>
       </entry>