diff --git a/README.md b/README.md
index 21f625a5..fae17c78 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ assembles it into an image. Pipelines are defined as JSON files like this one:
     "options": {
       "format": "qcow2",
       "filename": "example.qcow2",
+      "ptuuid": "0x7e83a7ba",
       "root_fs_uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac",
       "size": 3221225472
     }
diff --git a/assemblers/org.osbuild.qemu b/assemblers/org.osbuild.qemu
index 7e4b2852..5add2143 100755
--- a/assemblers/org.osbuild.qemu
+++ b/assemblers/org.osbuild.qemu
@@ -39,6 +39,7 @@ def loop_device(loop_client, image, size, offset=0):
 def main(tree, output_dir, options, loop_client):
     fmt = options["format"]
     filename = options["filename"]
+    ptuuid = options["ptuuid"]
     root_fs_uuid = options["root_fs_uuid"]
     size = options["size"]
 
@@ -56,7 +57,7 @@ def main(tree, output_dir, options, loop_client):
     subprocess.run(["truncate", "--size", str(size), image], check=True)
 
     # Set up the partition table of the image
-    partition_table = "label: mbr\nbootable, type=83"
+    partition_table = f"label: mbr\nlabel-id: {ptuuid}\nbootable, type=83"
     subprocess.run(["sfdisk", "-q", image], input=partition_table, encoding='utf-8', check=True)
     r = subprocess.run(["sfdisk", "--json", image], stdout=subprocess.PIPE, encoding='utf-8', check=True)
     partition_table = json.loads(r.stdout)
diff --git a/samples/base-qcow2.json b/samples/base-qcow2.json
index 97b03177..312a97fb 100644
--- a/samples/base-qcow2.json
+++ b/samples/base-qcow2.json
@@ -72,6 +72,7 @@
       "options": {
         "format": "qcow2",
         "filename": "base.qcow2",
+        "ptuuid": "0x14fc63d2",
         "root_fs_uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac",
         "size": 3221225472
       }
diff --git a/test/pipelines/f30-boot.json b/test/pipelines/f30-boot.json
index a5dcda4d..8c1a94c6 100644
--- a/test/pipelines/f30-boot.json
+++ b/test/pipelines/f30-boot.json
@@ -101,6 +101,7 @@
       "options": {
         "format": "qcow2",
 	"filename": "f30-boot.qcow2",
+        "ptuuid": "0x1cd1d44b",
         "root_fs_uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac",
         "size": 3221225472
       }