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 bdf2b0e5b..1249181a6 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
@@ -103,7 +103,7 @@ module.exports = function(RED) {
             if(src[propName] === "true" || src[propName] === true) {
                 dst[propName] = true;
             } else if(src[propName] === "false" || src[propName] === false) {
-                dst[propName] = true;
+                dst[propName] = false;
             }
         } else {
             if(def != undefined) dst[propName] = def;