diff --git a/data/rules/freecol/specification.xml b/data/rules/freecol/specification.xml
index 939cec084..94ec03cc2 100644
--- a/data/rules/freecol/specification.xml
+++ b/data/rules/freecol/specification.xml
@@ -121,6 +121,35 @@
         <scope ability-id="model.ability.upgradeConvert" ability-value="true"/>
       </unit-type-change>
     </unit-change-type>
+    <unit-change-type id="model.unitChange.experience" preserve="true">
+      <unit-type-change id="model.unitChange.experience.masterCarpenter"
+                        from="model.unit.freeColonist"
+                        to="model.unit.masterCarpenter" probability="4"/>
+      <unit-type-change id="model.unitChange.experience.firebrandPreacher"
+                        from="model.unit.freeColonist"
+                        to="model.unit.firebrandPreacher" probability="2"/>
+      <unit-type-change id="model.unitChange.experience.elderStatesman"
+                        from="model.unit.freeColonist"
+                        to="model.unit.elderStatesman" probability="2"/>
+      <unit-type-change id="model.unitChange.experience.masterDistiller"
+                        from="model.unit.freeColonist"
+                        to="model.unit.masterDistiller" probability="3"/>
+      <unit-type-change id="model.unitChange.experience.masterWeaver"
+                        from="model.unit.freeColonist"
+                        to="model.unit.masterWeaver" probability="3"/>
+      <unit-type-change id="model.unitChange.experience.masterTobacconist"
+                        from="model.unit.freeColonist"
+                        to="model.unit.masterTobacconist" probability="3"/>
+      <unit-type-change id="model.unitChange.experience.masterFurTrader"
+                        from="model.unit.freeColonist"
+                        to="model.unit.masterFurTrader" probability="3"/>
+      <unit-type-change id="model.unitChange.experience.masterBlacksmith"
+                        from="model.unit.freeColonist"
+                        to="model.unit.masterBlacksmith" probability="3"/>
+      <unit-type-change id="model.unitChange.experience.masterGunsmith"
+                        from="model.unit.freeColonist"
+                        to="model.unit.masterGunsmith" probability="3"/>
+    </unit-change-type>
   </unit-change-types>
 
   <founding-fathers>