diff --git a/defaults.xml b/defaults.xml
index 962d56eaf..51e04bc1c 100644
--- a/defaults.xml
+++ b/defaults.xml
@@ -895,6 +895,7 @@ Started September 2000 by David Megginson, david@megginson.com
 	  </lag>
       <visibility-range-nm type="int" userarchive="y">100</visibility-range-nm> <!-- MP2017 not supported in fgms so will do nothing-->
       <debug-level type="int" userarchive="n">0</debug-level>
+      <mp-clock-mode type="int">1</mp-clock-mode>
       <protocol-version type="int" userarchive="y">2</protocol-version>
       <transmit-filter-property-base type="int">0</transmit-filter-property-base>
       <transmit-filter-property-base-available type="bool">false</transmit-filter-property-base-available>