diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 08d9c16ece..21a49bd5ac 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2030,7 +2030,7 @@ virDomainActualNetDefFree(virDomainActualNetDefPtr def)
 
 
 virDomainVsockDefPtr
-virDomainVsockDefNew(virDomainXMLOptionPtr xmlopt ATTRIBUTE_UNUSED)
+virDomainVsockDefNew(virDomainXMLOptionPtr xmlopt)
 {
     virDomainVsockDefPtr ret = NULL;
     virDomainVsockDefPtr vsock;
@@ -2038,7 +2038,14 @@ virDomainVsockDefNew(virDomainXMLOptionPtr xmlopt ATTRIBUTE_UNUSED)
     if (VIR_ALLOC(vsock) < 0)
         return NULL;
 
+    if (xmlopt &&
+        xmlopt->privateData.vsockNew &&
+        !(vsock->privateData = xmlopt->privateData.vsockNew()))
+        goto cleanup;
+
     VIR_STEAL_PTR(ret, vsock);
+ cleanup:
+    virDomainVsockDefFree(vsock);
     return ret;
 }
 
@@ -2046,6 +2053,10 @@ virDomainVsockDefNew(virDomainXMLOptionPtr xmlopt ATTRIBUTE_UNUSED)
 void
 virDomainVsockDefFree(virDomainVsockDefPtr vsock)
 {
+    if (!vsock)
+        return;
+
+    virObjectUnref(vsock->privateData);
     VIR_FREE(vsock);
 }
 
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 187cae9428..7877bcc9b1 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2315,6 +2315,7 @@ struct _virDomainIOMMUDef {
 };
 
 struct _virDomainVsockDef {
+    virObjectPtr privateData;
 };
 
 struct _virDomainVirtioOptions {
@@ -2687,6 +2688,7 @@ struct _virDomainXMLPrivateDataCallbacks {
     virDomainXMLPrivateDataNewFunc    diskNew;
     virDomainXMLPrivateDataNewFunc    vcpuNew;
     virDomainXMLPrivateDataNewFunc    chrSourceNew;
+    virDomainXMLPrivateDataNewFunc    vsockNew;
     virDomainXMLPrivateDataFormatFunc format;
     virDomainXMLPrivateDataParseFunc  parse;
     /* following function shall return a pointer which will be used as the