diff --git a/binaries/data/mods/public/simulation/templates/units/rome_mechanical_siege_onager_unpacked.xml b/binaries/data/mods/public/simulation/templates/units/rome_mechanical_siege_onager_unpacked.xml
index b7a2dd0927..acfd96fae8 100644
--- a/binaries/data/mods/public/simulation/templates/units/rome_mechanical_siege_onager_unpacked.xml
+++ b/binaries/data/mods/public/simulation/templates/units/rome_mechanical_siege_onager_unpacked.xml
@@ -33,6 +33,7 @@
     <SpecificName>Onager</SpecificName>
     <Icon>units/rome_siege_onager.png</Icon>
   </Identity>
+  <Pack disable=""/>
   <UnitMotion>
     <WalkSpeed>0.001</WalkSpeed>
     <Run>