diff --git a/examples/ONE_I-9PSL/ONE_I-9PSL.ino b/examples/ONE_I-9PSL/ONE_I-9PSL.ino
index 550d3fa..74dde97 100644
--- a/examples/ONE_I-9PSL/ONE_I-9PSL.ino
+++ b/examples/ONE_I-9PSL/ONE_I-9PSL.ino
@@ -971,7 +971,7 @@ static String getServerSyncData(bool localServer) {
       root["tvoc_raw"] = tvocRawIndex;
     }
     if (noxIndex >= 0) {
-      root["noxIndex"] = noxIndex;
+      root["nox_index"] = noxIndex;
     }
   }
   if (hasSensorSHT) {