diff --git a/components/net/at/at_socket/at_socket.c b/components/net/at/at_socket/at_socket.c
index c21d019717..9575868116 100644
--- a/components/net/at/at_socket/at_socket.c
+++ b/components/net/at/at_socket/at_socket.c
@@ -248,7 +248,7 @@ static void at_do_event_changes(struct at_socket *sock, at_event_t event, rt_boo
         break;
     }
     default:
-        LOG_E("Not supported event (%d)", event)
+        LOG_E("Not supported event (%d)", event);
     }
 }
 
diff --git a/components/net/at/src/at_client.c b/components/net/at/src/at_client.c
index 42a6f4b980..6e9e3541fc 100644
--- a/components/net/at/src/at_client.c
+++ b/components/net/at/src/at_client.c
@@ -748,7 +748,7 @@ static int at_client_para_init(at_client_t client)
     client->recv_buffer = (char *) rt_calloc(1, client->recv_bufsz);
     if (client->recv_buffer == RT_NULL)
     {
-        LOG_E("AT client initialize failed! No memory for receive buffer.")
+        LOG_E("AT client initialize failed! No memory for receive buffer.");
         result = -RT_ENOMEM;
         goto __exit;
     }
diff --git a/components/net/sal_socket/src/sal_socket.c b/components/net/sal_socket/src/sal_socket.c
index c4b4afe900..351506756f 100644
--- a/components/net/sal_socket/src/sal_socket.c
+++ b/components/net/sal_socket/src/sal_socket.c
@@ -489,8 +489,7 @@ int sal_shutdown(int socket, int how)
     if (sock->ops->shutdown((int) sock->user_data, how) == 0)
     {
         rt_free(sock);
-        sock =  RT_NULL;
-        
+        socket_table.sockets[socket] = RT_NULL;
         return 0;
     }
 
@@ -697,9 +696,8 @@ int sal_closesocket(int socket)
 
     if (sock->ops->closesocket((int) sock->user_data) == 0)
     {
-        rt_free(sock);
-        sock = RT_NULL;
-        
+        rt_free(sock);        
+        socket_table.sockets[socket] = RT_NULL;
         return 0;
     }