diff --git a/src/plugins/filemanager/dfmplugin-search/3rdparty/fsearch/fsearch_thread_pool.c b/src/plugins/filemanager/dfmplugin-search/3rdparty/fsearch/fsearch_thread_pool.c
index 35ee6899c5..2150383540 100644
--- a/src/plugins/filemanager/dfmplugin-search/3rdparty/fsearch/fsearch_thread_pool.c
+++ b/src/plugins/filemanager/dfmplugin-search/3rdparty/fsearch/fsearch_thread_pool.c
@@ -20,6 +20,8 @@
 
 #include "fsearch_thread_pool.h"
 #include <sys/time.h>
+#include <unistd.h>
+
 struct _FsearchThreadPool {
     GList *threads;
     uint32_t num_threads;