diff --git a/generator/mavschema.xsd b/generator/mavschema.xsd
index 4373aa87c..032a1567a 100644
--- a/generator/mavschema.xsd
+++ b/generator/mavschema.xsd
@@ -178,6 +178,7 @@
 <xs:simpleType name="factor">
   <xs:restriction base="xs:string">
     <xs:enumeration value="1E-2"/>        <!-- actual value = stated value / 100 -->
+    <xs:enumeration value="360/255"/>     <!-- actual value = stated value * 360/255, as used for GPS_STATUS.satellite_azimuth -->
   </xs:restriction>
 </xs:simpleType>