diff --git a/src/PVE/QemuServer/Drive.pm b/src/PVE/QemuServer/Drive.pm
index 0b57371..72abac0 100644
--- a/src/PVE/QemuServer/Drive.pm
+++ b/src/PVE/QemuServer/Drive.pm
@@ -594,6 +594,7 @@ my $tpmstate_fmt = {
         description => "Disk size. This is purely informational and has no effect.",
         optional => 1,
     },
+    backup => $drivedesc_base{backup},
     %tpmversion_fmt,
 };
 my $tpmstate_desc = {
diff --git a/src/test/parse-config-input/tpmstate-no-backup.conf b/src/test/parse-config-input/tpmstate-no-backup.conf
new file mode 100644
index 0000000..1560372
--- /dev/null
+++ b/src/test/parse-config-input/tpmstate-no-backup.conf
@@ -0,0 +1,16 @@
+# VM with a TPM state that is excluded from backups
+bios: ovmf
+boot: order=scsi0;net0
+cores: 2
+efidisk0: local-lvm:vm-8006-disk-0,efitype=4m,ms-cert=2023k,pre-enrolled-keys=1,size=4M
+machine: pc-q35-10.1
+memory: 4096
+name: win11
+net0: virtio=BC:24:11:3E:8A:D1,bridge=vmbr0
+ostype: win11
+scsi0: local-lvm:vm-8006-disk-1,size=64G
+scsihw: virtio-scsi-single
+smbios1: uuid=5b1f3c7e-2d4a-4c8e-9f6b-7a3e1d2c4b5f
+sockets: 1
+tpmstate0: local-lvm:vm-8006-disk-2,backup=0,size=4M,version=v2.0
+vmgenid: 6a7d2f3e-1b4c-4d5e-8f9a-0b1c2d3e4f5a
diff --git a/src/test/run_parse_config_tests.pl b/src/test/run_parse_config_tests.pl
index 62e36ee..84602e4 100644
--- a/src/test/run_parse_config_tests.pl
+++ b/src/test/run_parse_config_tests.pl
@@ -26,7 +26,7 @@ my $OUTPUT_DIR = './parse-config-output';
 my $EXPECTED_DIR = './parse-config-expected';
 
 # NOTE update when you add/remove tests
-plan tests => 2 * 10;
+plan tests => 2 * 11;
 
 sub run_tests {
     my ($strict) = @_;