diff --git a/project/Core/Src/tcp_cmd.c b/project/Core/Src/tcp_cmd.c
index 4d73f12..ba8bc53 100644
--- a/project/Core/Src/tcp_cmd.c
+++ b/project/Core/Src/tcp_cmd.c
@@ -19,6 +19,7 @@ static void tcp_cmd_close(struct tcp_pcb* pcb) {
 static err_t tcp_cmd_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err) {
     size_t i;
     size_t len;
+    size_t number_of_files;
     uint8_t file_in_fs;
     uint8_t check = 0;