diff --git a/problems/kamacoder/0099.岛屿的数量广搜.md b/problems/kamacoder/0099.岛屿的数量广搜.md
index 9d31c922..522e19c3 100644
--- a/problems/kamacoder/0099.岛屿的数量广搜.md
+++ b/problems/kamacoder/0099.岛屿的数量广搜.md
@@ -254,6 +254,7 @@ directions = [[0, 1], [1, 0], [0, -1], [-1, 0]]
 def bfs(grid, visited, x, y):
     que = deque([])
     que.append([x,y])
+    visited[x][y] = True
     while que:
         cur_x, cur_y = que.popleft()
         for i, j in directions: