diff --git a/docs/formatdomaincaps.rst b/docs/formatdomaincaps.rst
index a2ad0acc3d..be45de8996 100644
--- a/docs/formatdomaincaps.rst
+++ b/docs/formatdomaincaps.rst
@@ -629,6 +629,31 @@ Crypto device capabilities are exposed under the ``crypto`` element. For instanc
 ``backendModel``
    Options for the ``backendModel`` attribute of the ``<crypto><backend/>`` element.
 
+Interface device
+^^^^^^^^^^^^^^^^
+
+Interface device corresponds to `network interface
+<formatdomain.html#network-interfaces>`__ (``<interface/>``) in domain XML.
+
+::
+
+  <domainCapabilities>
+    ...
+    <devices>
+      <interface supported='yes'>
+        <enum name='backendType'>
+          <value>default</value>
+          <value>passt</value>
+        </enum>
+      </interface>
+      ...
+    </devices>
+  </domainCapabilities>
+
+``backendType``
+   Options for the ``type`` attribute of the ``<backend/>`` element
+
+
 Features
 ~~~~~~~~
 
diff --git a/src/conf/domain_capabilities.c b/src/conf/domain_capabilities.c
index 3f2d231d1c..199bac006b 100644
--- a/src/conf/domain_capabilities.c
+++ b/src/conf/domain_capabilities.c
@@ -607,6 +607,18 @@ virDomainCapsDeviceCryptoFormat(virBuffer *buf,
 }
 
 
+static void
+virDomainCapsDeviceNetFormat(virBuffer *buf,
+                             const virDomainCapsDeviceNet *interface)
+{
+    FORMAT_PROLOGUE(interface);
+
+    ENUM_PROCESS(interface, backendType, virDomainNetBackendTypeToString);
+
+    FORMAT_EPILOGUE(interface);
+}
+
+
 /**
  * virDomainCapsFeatureGICFormat:
  * @buf: target buffer
@@ -787,6 +799,7 @@ virDomainCapsFormat(const virDomainCaps *caps)
     virDomainCapsDeviceRedirdevFormat(&buf, &caps->redirdev);
     virDomainCapsDeviceChannelFormat(&buf, &caps->channel);
     virDomainCapsDeviceCryptoFormat(&buf, &caps->crypto);
+    virDomainCapsDeviceNetFormat(&buf, &caps->net);
 
     virBufferAdjustIndent(&buf, -2);
     virBufferAddLit(&buf, "</devices>\n");
diff --git a/src/conf/domain_capabilities.h b/src/conf/domain_capabilities.h
index 986f3cb394..3fe62ce211 100644
--- a/src/conf/domain_capabilities.h
+++ b/src/conf/domain_capabilities.h
@@ -250,6 +250,13 @@ struct _virDomainCapsDeviceCrypto {
     virDomainCapsEnum backendModel;   /* virDomainCryptoBackend */
 };
 
+STATIC_ASSERT_ENUM(VIR_DOMAIN_NET_BACKEND_LAST);
+typedef struct _virDomainCapsDeviceNet virDomainCapsDeviceNet;
+struct _virDomainCapsDeviceNet {
+    virTristateBool supported;
+    virDomainCapsEnum backendType; /* virDomainNetBackendType */
+};
+
 typedef enum {
     VIR_DOMAIN_CAPS_FEATURE_IOTHREADS = 0,
     VIR_DOMAIN_CAPS_FEATURE_VMCOREINFO,
@@ -286,6 +293,7 @@ struct _virDomainCaps {
     virDomainCapsDeviceRedirdev redirdev;
     virDomainCapsDeviceChannel channel;
     virDomainCapsDeviceCrypto crypto;
+    virDomainCapsDeviceNet net;
     /* add new domain devices here */
 
     virDomainCapsFeatureGIC gic;
diff --git a/src/conf/schemas/domaincaps.rng b/src/conf/schemas/domaincaps.rng
index b8115fe028..f17a4e681d 100644
--- a/src/conf/schemas/domaincaps.rng
+++ b/src/conf/schemas/domaincaps.rng
@@ -212,6 +212,9 @@
       <optional>
         <ref name="crypto"/>
       </optional>
+      <optional>
+        <ref name="interface"/>
+      </optional>
     </element>
   </define>
 
@@ -285,6 +288,13 @@
     </element>
   </define>
 
+  <define name="interface">
+    <element name="interface">
+      <ref name="supported"/>
+      <ref name="enum"/>
+    </element>
+  </define>
+
   <define name="launchSecurity">
     <element name="launchSecurity">
       <ref name="supported"/>