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 1835582e6..ce97f613f 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
@@ -24,7 +24,6 @@ module.exports = function(RED) {
         "text/css":"string",
         "text/html":"string",
         "text/plain":"string",
-        "text/html":"string",
         "application/json":"json",
         "application/octet-stream":"buffer",
         "application/pdf":"buffer",