diff --git a/image/mkosi.files/mkosi.openstack.conf b/image/mkosi.files/mkosi.openstack.conf
index 35ac99754..3271b3fe8 100644
--- a/image/mkosi.files/mkosi.openstack.conf
+++ b/image/mkosi.files/mkosi.openstack.conf
@@ -1,5 +1,5 @@
 [Output]
-KernelCommandLine=constel.csp=openstack constel.attestation-variant=qemu-vtpm mem_encrypt=on kvm_amd.sev=1 module_blacklist=qemu_fw_cfg console=tty0 console=ttyS0
+KernelCommandLine=constel.csp=openstack constel.attestation-variant=dummy mem_encrypt=on kvm_amd.sev=1 module_blacklist=qemu_fw_cfg console=tty0 console=ttyS0
 OutputDirectory=mkosi.output.openstack
 
 [Content]