diff --git a/_posts/2024-05-27-suffix-automaton-instead-of-suffix-array-2.md b/_posts/2024-05-27-suffix-automaton-instead-of-suffix-array-2.md
index 7328f669..46abe197 100644
--- a/_posts/2024-05-27-suffix-automaton-instead-of-suffix-array-2.md
+++ b/_posts/2024-05-27-suffix-automaton-instead-of-suffix-array-2.md
@@ -58,6 +58,7 @@ struct SuffixAutomaton {
 
 ```c++
 set<int> s[N];
+bool vis[N];
 void dfs(int cur) {
 	if(vis[cur]) return;
 	vis[cur] = 1;
@@ -77,6 +78,7 @@ void dfs(int cur) {
 
 ```c++
 set<int> s[N];
+bool vis[N];
 void dfs(int cur) {
 	if(vis[cur]) return;
 	vis[cur] = 1;