diff --git a/README.md b/README.md
index d486b85..b1ff751 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ for(int i = 0 ; i < a.length ; i++)
 ```
 while(low <= high)
 {
-  mid = (low + high) / 2;
+  mid = low + (high - low) / 2;
             
   if( key == a[mid])
   {