diff --git a/Chapter 05/demo4.html b/Chapter 05/demo4.html
index bf659cd..f4ad38b 100644
--- a/Chapter 05/demo4.html
+++ b/Chapter 05/demo4.html
@@ -9,7 +9,7 @@
var num2 = 5;
var add = num1 + num2;
- alert("Add = "+sum);
+ alert("Add = "+add);
var subtract = num1 - num2;
alert("Subtract = "+subtract);
@@ -31,4 +31,4 @@
-
\ No newline at end of file
+