diff --git a/live-build/ubuntu-cpc/hooks.d/base/ovf/ubuntu-ova-v1-vmdk.tmpl b/live-build/ubuntu-cpc/hooks.d/base/ovf/ubuntu-ova-v1-vmdk.tmpl
index 77ecc93d..b15d73e5 100644
--- a/live-build/ubuntu-cpc/hooks.d/base/ovf/ubuntu-ova-v1-vmdk.tmpl
+++ b/live-build/ubuntu-cpc/hooks.d/base/ovf/ubuntu-ova-v1-vmdk.tmpl
@@ -85,7 +85,7 @@
         <rasd:ResourceType>6</rasd:ResourceType>
       </Item>
       <Item ovf:required="false">
-        <rasd:AutomaticAllocation>true</rasd:AutomaticAllocation>
+        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
         <rasd:ElementName>serial0</rasd:ElementName>
         <rasd:InstanceID>4</rasd:InstanceID>
         <rasd:ResourceSubType>vmware.serialport.device</rasd:ResourceSubType>