diff --git a/payload/index.html b/payload/index.html
index 0f75743..5368bc7 100644
--- a/payload/index.html
+++ b/payload/index.html
@@ -111,7 +111,7 @@
         ],
         "hm330x": [
           { "name": "pm1", "type": "UInt16", "factor": 1, "multi": false },
-          { "name": "pm2.5", "type": "UInt16", "factor": 1, "multi": false },
+          { "name": "pm2_5", "type": "UInt16", "factor": 1, "multi": false },
           { "name": "pm10", "type": "UInt16", "factor": 1, "multi": false },
         ],
         "ds18b20": [