diff --git a/examples/sse-item-store-jaxrs-webapp/src/main/webapp/js/engine.js b/examples/sse-item-store-jaxrs-webapp/src/main/webapp/js/engine.js
index a77a98e9c6..c8cdb0fc25 100644
--- a/examples/sse-item-store-jaxrs-webapp/src/main/webapp/js/engine.js
+++ b/examples/sse-item-store-jaxrs-webapp/src/main/webapp/js/engine.js
@@ -89,7 +89,7 @@ function receiveMessages() {
             display("Added new item: " + event.data, "#444444");
         };
 
-        source.addEventListener("size", function(e) {
+        source.addEventListener("size", function (event) {
             console.log('Received event ' + event.name + ': ' + event.data);
             display("New items size: " + event.data, "#0000FF");
         }, false);
diff --git a/examples/sse-item-store-jersey-webapp/src/main/webapp/js/engine.js b/examples/sse-item-store-jersey-webapp/src/main/webapp/js/engine.js
index 6bf486f0c4..22cd99c249 100644
--- a/examples/sse-item-store-jersey-webapp/src/main/webapp/js/engine.js
+++ b/examples/sse-item-store-jersey-webapp/src/main/webapp/js/engine.js
@@ -89,7 +89,7 @@ function receiveMessages() {
             display("Added new item: " + event.data, "#444444");
         };
 
-        source.addEventListener("size", function(e) {
+        source.addEventListener("size", function (event) {
             console.log('Received event ' + event.name + ': ' + event.data);
             display("New items size: " + event.data, "#0000FF");
         }, false);