--- a/src/brutalplayer.cpp	2007-01-23 05:02:18.000000000 +0100
+++ b/src/brutalplayer.cpp	2026-10-19 16:48:32.820534406 +0200
@@ -10,6 +10,7 @@
 #include "chessplayer.h"
 #include "options.h"
 
+#include <climits>
 #include <vector>
 #include <time.h>
 
--- a/src/faileplayer.cpp	2006-12-20 21:19:50.000000000 +0100
+++ b/src/faileplayer.cpp	2026-10-19 16:46:38.599636203 +0200
@@ -14,6 +14,7 @@
 #include <cassert>
 #include <sstream>
 #include <string>
+#include <unistd.h>
 
 using namespace std;
 
--- a/src/xboardplayer.cpp	2006-12-19 05:00:01.000000000 +0100
+++ b/src/xboardplayer.cpp	2026-10-19 16:46:38.651622855 +0200
@@ -14,6 +14,7 @@
 #include <cassert>
 #include <sstream>
 #include <string>
+#include <unistd.h>
 
 using namespace std;