diff --git a/tools/esp8266/html/setup.html b/tools/esp8266/html/setup.html
index db688f87..156b1fb2 100644
--- a/tools/esp8266/html/setup.html
+++ b/tools/esp8266/html/setup.html
@@ -91,7 +91,7 @@
                         <label for="serIntvl">Interval [s]</label>
                         <input type="text" class="text" name="serIntvl"/><br/><br/>
 
-                        <label for="lvl">Debug Level:</label>
+                        <label for="lvl">Debug Level (not work):</label>
                         Off<input type="radio" id="lvl" name="dbg_lvl0" value="0">
                         Error<input type="radio" id="lvl" name="dbg_lvl1" value="1">
                         Warn<input type="radio" id="lvl" name="dbg_lvl2" value="2">