--- src/uterm.cc	2019-04-24 08:18:18.000000000 +0800
+++ src/uterm.cc	2026-04-27 03:44:51.000000000 +0800
@@ -2,6 +2,7 @@
 
 #include <sys/wait.h>
 #include <signal.h>
+#include <unistd.h>
 
 Uterm gUterm;