diff --git a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html
index cf4015f2e..ecef71366 100644
--- a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html
+++ b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html
@@ -480,6 +480,7 @@
             willRetain: {value:false},
             willPayload: {value:""},
             willMsg: { value: {}},
+            userProps: { value: ""},
             sessionExpiry: {value:0}
         },
         credentials: {
@@ -719,9 +720,13 @@
             }
 
             if (v5) {
-                const userProps = $("#node-config-input-userProps").val().trim();
-                if (userProps) {
-                    this.userProps = userProps;
+                this.userProps = "";
+                const userPropsType = $("#node-config-input-userProps").typedInput("type");
+                if(userPropsType == "json") {
+                    const userProps = $("#node-config-input-userProps").val();
+                    if (userProps && typeof userProps === "string") {
+                        this.userProps = userProps.trim();
+                    }
                 }
                 this.birthMsg = saveV5Message("birth");
                 this.closeMsg = saveV5Message("close");
diff --git a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
index a026fdc29..1e8f8ce9c 100644
--- a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
+++ b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
@@ -415,8 +415,12 @@ module.exports = function(RED) {
             setIfHasProperty(opts, node, "topicAliasMaximum", init);
             setIfHasProperty(opts, node, "maximumPacketSize", init);
             setIfHasProperty(opts, node, "receiveMaximum", init);
-            setIfHasProperty(opts, node, "userProperties", init);//https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901116
-            setIfHasProperty(opts, node, "userPropertiesType", init);
+            //https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901116
+            if (hasProperty(opts, "userProperties")) {
+                node.userProperties = opts.userProperties;
+            } else if (hasProperty(opts, "userProps")) {
+                node.userProperties = opts.userProps;
+            }
 
             function createLWT(topic, payload, qos, retain, v5opts, v5SubPropName) {
                 let message = undefined;