diff --git a/libraries/ESP8266WebServer/examples/SDWebServer/SdRoot/edit/index.htm b/libraries/ESP8266WebServer/examples/SDWebServer/SdRoot/edit/index.htm
index 5b8432a69..87254fc70 100644
--- a/libraries/ESP8266WebServer/examples/SDWebServer/SdRoot/edit/index.htm
+++ b/libraries/ESP8266WebServer/examples/SDWebServer/SdRoot/edit/index.htm
@@ -355,8 +355,8 @@
           var divContext = document.createElement("div");
           var scrollTop = document.body.scrollTop ? document.body.scrollTop : document.documentElement.scrollTop;
           var scrollLeft = document.body.scrollLeft ? document.body.scrollLeft : document.documentElement.scrollLeft;
-          var left = event.clientX + scrollLeft;
-          var top = event.clientY + scrollTop;
+          var left = e.clientX + scrollLeft;
+          var top = e.clientY + scrollTop;
           divContext.className = 'contextMenu';
           divContext.style.display = 'block';
           divContext.style.left = left + 'px';