diff --git a/animation-simulation/链表篇/面试题 02.05. 链表求和.md b/animation-simulation/链表篇/面试题 02.05. 链表求和.md
index fcdb8c5..3dde8b2 100644
--- a/animation-simulation/链表篇/面试题 02.05. 链表求和.md	
+++ b/animation-simulation/链表篇/面试题 02.05. 链表求和.md	
@@ -203,7 +203,7 @@ class Solution:
         tempnode = nList
         # 用来保存进位值，初始化为0
         summod = 0
-        while l1 is not None o l2 is not None:
+        while l1 is not None or l2 is not None:
             # 如果l1的链表为空则l1num为0，若是不为空，则为链表的节点值
             # 判断是否为空，为空就设为0
             l1num = 0 if l1 is None else l1.val