diff --git a/www/pgm2/fhemweb.js b/www/pgm2/fhemweb.js
index de1d82d2b..0b0792687 100644
--- a/www/pgm2/fhemweb.js
+++ b/www/pgm2/fhemweb.js
@@ -570,7 +570,7 @@ FW_queryValue(cmd, el)
   query = addcsrf(query);
   var qConn = new XMLHttpRequest();
   qConn.onreadystatechange = function() {
-    if(qConn.readyState != 3)
+    if(qConn.readyState != 4)
       return;
     var qResp = qConn.responseText.replace(/[\r\n]/g, "");
     if(el.setValueFn)