diff --git a/2.6.md b/2.6.md
index f96c00e6..d1a3b6b7 100644
--- a/2.6.md
+++ b/2.6.md
@@ -56,7 +56,7 @@ interface类型定义了一组方法，如果某个对象实现了某个接口
 	
 	//Student实现BorrowMoney方法
 	func (s *Student) BorrowMoney(amount float32) {
-	    loan += amount // (again and again and...)
+	    s.loan += amount // (again and again and...)
 	}
 	
 	//Employee实现SpendSalary方法