diff -Nur dde-file-manager-5.6.4/3rdparty/fsearch/fsearch_thread_pool.c dde-file-manager-5.6.4-new/3rdparty/fsearch/fsearch_thread_pool.c
--- dde-file-manager-5.6.4/3rdparty/fsearch/fsearch_thread_pool.c	2022-06-11 21:02:35.000000000 +0800
+++ dde-file-manager-5.6.4-new/3rdparty/fsearch/fsearch_thread_pool.c	2024-10-04 21:10:10.069243685 +0800
@@ -20,6 +20,7 @@
 
 #include "fsearch_thread_pool.h"
 #include <sys/time.h>
+#include <unistd.h>
 struct _FsearchThreadPool {
     GList *threads;
     uint32_t num_threads;