diff --git a/day7/homework/h6.c b/day7/homework/h6.c
index c74be24..224478c 100644
--- a/day7/homework/h6.c
+++ b/day7/homework/h6.c
@@ -7,7 +7,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-pthread_mutex_t mutux = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 
 typedef struct node
 {
@@ -21,7 +21,7 @@ void *find(void *data)
 {
     int n = 0; // 标识待查询内容在链表中的索引号
     char *name = (char *)data;
-    pthread_mutex_lock(&mutux);
+    pthread_mutex_lock(&mutex);
     // 查询
     Node *p = head->next;
     while (p != NULL)
@@ -29,7 +29,7 @@ void *find(void *data)
         if (strcmp(p->name, name) == 0)
         {
             printf("%s 在链表的索引为 %d\n", name, n);
-            pthread_mutex_unlock(&mutux);
+            pthread_mutex_unlock(&mutex);
 
             return NULL;
         }
@@ -38,7 +38,7 @@ void *find(void *data)
         p = p->next;
     }
     printf("%s 在链表中未找到\n", name);
-    pthread_mutex_unlock(&mutux);
+    pthread_mutex_unlock(&mutex);
 
     return NULL;
 }
@@ -89,5 +89,7 @@ int main(int argc, char const *argv[])
         pthread_join(t[i], NULL);
     }
 
+    pthread_mutex_destroy(&mutex);
+
     return 0;
 }