diff --git a/problems/1002.查找常用字符.md b/problems/1002.查找常用字符.md
index a789373b..c165f985 100644
--- a/problems/1002.查找常用字符.md
+++ b/problems/1002.查找常用字符.md
@@ -181,7 +181,7 @@ class Solution:
         # 统计除第一个字符串外字符的出现频率
         for i in range(1, len(words)):
             hashOtherStr = [0] * 26
-            for j in range(len(words[0])):
+            for j in range(len(words[i])):
                 hashOtherStr[ord(words[i][j]) - ord('a')] += 1
             # 更新hash，保证hash里统计26个字符在所有字符串里出现的最小次数
             for k in range(26):