diff --git a/applications/fpvviewer/examples_files/html/areaofcircle.html b/applications/fpvviewer/examples_files/html/areaofcircle.html
index 29dea9c5b..42e37619b 100644
--- a/applications/fpvviewer/examples_files/html/areaofcircle.html
+++ b/applications/fpvviewer/examples_files/html/areaofcircle.html
@@ -1,7 +1,7 @@
 ﻿<!DOCTYPE html>
 <html lang="en">
   <head>
-    <meta charset="utf-8">
+    <meta charset="utf-8" />
     <title>Area of a circle</title>
   </head>
   <body>
@@ -98,8 +98,8 @@
     <p>
       The area of a circle is
       <math>
-        <mi>&pi;</mi>
-        <mo>&InvisibleTimes;</mo>
+        <mi>π</mi>
+        <mo>x</mo>
         <msup>
           <mi>r</mi>
           <mn>2</mn>
@@ -107,4 +107,4 @@
       </math>.
     </p>
   </body>
-</html>  
\ No newline at end of file
+</html>  
