diff --git a/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml b/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml
index 9f71f7b229c6305c9f01e73f239c76dfb5eed224..a88bad6cb8c462987fd6597f010811ab160862e3 100644
--- a/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml
+++ b/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml
@@ -1238,7 +1238,7 @@ This parameter controls the time constant of the decay</short_desc>
       <short_desc>Integer bitmask controlling data fusion and aiding methods</short_desc>
       <long_desc>Set bits in the following positions to enable: 0 : Set to true to use GPS data if available 1 : Set to true to use optical flow data if available 2 : Set to true to inhibit IMU delta velocity bias estimation 3 : Set to true to enable vision position fusion 4 : Set to true to enable vision yaw fusion. Cannot be used if bit position 7 is true. 5 : Set to true to enable multi-rotor drag specific force fusion 6 : set to true if the EV observations are in a non NED reference frame and need to be rotated before being used 7 : Set to true to enable GPS yaw fusion. Cannot be used if bit position 4 is true.</long_desc>
       <min>0</min>
-      <max>255</max>
+      <max>511</max>
       <reboot_required>true</reboot_required>
       <bitmask>
         <bit index="0">use GPS</bit>
@@ -1249,6 +1249,7 @@ This parameter controls the time constant of the decay</short_desc>
         <bit index="5">multi-rotor drag fusion</bit>
         <bit index="6">rotate external vision</bit>
         <bit index="7">GPS yaw fusion</bit>
+        <bit index="8">vision velocity fusion</bit>
       </bitmask>
     </parameter>
     <parameter default="0.1" name="EKF2_ANGERR_INIT" type="FLOAT">