diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 1ed4cda7f0..4a03f4794b 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -672,6 +672,9 @@ VIR_ENUM_IMPL(virQEMUCaps,
               "virtio-iommu-pci", /* QEMU_CAPS_DEVICE_VIRTIO_IOMMU_PCI */
               "virtio-iommu.boot-bypass", /* QEMU_CAPS_VIRTIO_IOMMU_BOOT_BYPASS */
               "virtio-net.rss", /* QEMU_CAPS_VIRTIO_NET_RSS */
+
+              /* 430 */
+              "chardev.qemu-vdagent", /* QEMU_CAPS_CHARDEV_QEMU_VDAGENT */
     );
 
 
@@ -1622,6 +1625,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsQMPSchemaQueries[] = {
     { "set-numa-node/arg-type/+hmat-lb", QEMU_CAPS_NUMA_HMAT },
     { "object-add/arg-type/+sev-guest/kernel-hashes", QEMU_CAPS_SEV_GUEST_KERNEL_HASHES },
     { "calc-dirty-rate/arg-type/mode", QEMU_CAPS_DIRTYRATE_MODE },
+    { "chardev-add/arg-type/backend/+qemu-vdagent", QEMU_CAPS_CHARDEV_QEMU_VDAGENT },
 };
 
 typedef struct _virQEMUCapsObjectTypeProps virQEMUCapsObjectTypeProps;
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 9b240e47fb..baddb059b2 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -648,6 +648,9 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
     QEMU_CAPS_VIRTIO_IOMMU_BOOT_BYPASS, /* virtio-iommu.boot-bypass */
     QEMU_CAPS_VIRTIO_NET_RSS, /* virtio-net rss feature */
 
+    /* 430 */
+    QEMU_CAPS_CHARDEV_QEMU_VDAGENT, /* -chardev qemu-vdagent */
+
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
 
diff --git a/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
index ddeca62290..7127e5d18a 100644
--- a/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
@@ -236,6 +236,7 @@
   <flag name='memory-backend-file.prealloc-threads'/>
   <flag name='virtio-iommu-pci'/>
   <flag name='virtio-net.rss'/>
+  <flag name='chardev.qemu-vdagent'/>
   <version>6001000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100243</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml
index 5538940372..e45682a648 100644
--- a/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml
@@ -201,6 +201,7 @@
   <flag name='memory-backend-file.prealloc-threads'/>
   <flag name='virtio-iommu-pci'/>
   <flag name='virtio-net.rss'/>
+  <flag name='chardev.qemu-vdagent'/>
   <version>6001050</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>61700244</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml
index dba5ecaf87..5eae115b28 100644
--- a/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml
@@ -238,6 +238,7 @@
   <flag name='memory-backend-file.prealloc-threads'/>
   <flag name='virtio-iommu-pci'/>
   <flag name='virtio-net.rss'/>
+  <flag name='chardev.qemu-vdagent'/>
   <version>6002000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100244</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml
index 257b0f625d..c20b360e01 100644
--- a/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml
@@ -209,6 +209,7 @@
   <flag name='virtio-iommu-pci'/>
   <flag name='virtio-iommu.boot-bypass'/>
   <flag name='virtio-net.rss'/>
+  <flag name='chardev.qemu-vdagent'/>
   <version>6002092</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>61700243</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml
index de989bea24..945227b7f4 100644
--- a/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml
@@ -213,6 +213,7 @@
   <flag name='virtio-iommu-pci'/>
   <flag name='virtio-iommu.boot-bypass'/>
   <flag name='virtio-net.rss'/>
+  <flag name='chardev.qemu-vdagent'/>
   <version>7000000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>42900243</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml
index 8074c97ecd..48fef44c9a 100644
--- a/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml
@@ -242,6 +242,7 @@
   <flag name='virtio-iommu-pci'/>
   <flag name='virtio-iommu.boot-bypass'/>
   <flag name='virtio-net.rss'/>
+  <flag name='chardev.qemu-vdagent'/>
   <version>7000000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100243</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml
index dd37a3762c..332d9a1ac3 100644
--- a/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml
@@ -242,6 +242,7 @@
   <flag name='virtio-iommu-pci'/>
   <flag name='virtio-iommu.boot-bypass'/>
   <flag name='virtio-net.rss'/>
+  <flag name='chardev.qemu-vdagent'/>
   <version>7000050</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100244</microcodeVersion>