diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 8657275442..85868d7596 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -645,6 +645,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
               "memory-backend-file.reserve", /* QEMU_CAPS_MEMORY_BACKEND_RESERVE */
               "piix4.acpi-root-pci-hotplug", /* QEMU_CAPS_PIIX4_ACPI_ROOT_PCI_HOTPLUG */
               "ich9.acpi-hotplug-bridge", /* QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE */
+              "netdev.json", /* QEMU_CAPS_NETDEV_JSON */
     );
 
 
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 02b96de523..80e2d58dde 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -625,6 +625,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
     QEMU_CAPS_MEMORY_BACKEND_RESERVE, /* -object memory-backend-*.reserve= */
     QEMU_CAPS_PIIX4_ACPI_ROOT_PCI_HOTPLUG, /* -M pc PIIX4_PM.acpi-root-pci-hotplug */
     QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE, /* -M q35 ICH9-LPC.acpi-pci-hotplug-with-bridge-support */
+    QEMU_CAPS_NETDEV_JSON, /* -netdev accepts JSON */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;