diff --git a/lib/utils/mu-utils-file.cc b/lib/utils/mu-utils-file.cc
index a8be5220..3daea34a 100644
--- a/lib/utils/mu-utils-file.cc
+++ b/lib/utils/mu-utils-file.cc
@@ -1,5 +1,5 @@
 /*
-** Copyright (C) 2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+** Copyright (C) 2023-2024 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
 **
 ** This program is free software; you can redistribute it and/or modify it
 ** under the terms of the GNU General Public License as published by the
@@ -23,6 +23,7 @@
 #include "mu-utils-file.hh"
 
 #include <sys/stat.h>
+#include <sys/wait.h>
 
 #include <glib.h>
 #include <gio/gio.h>
diff --git a/mu/mu-cmd-find.cc b/mu/mu-cmd-find.cc
index f21ff6e5..3853856d 100644
--- a/mu/mu-cmd-find.cc
+++ b/mu/mu-cmd-find.cc
@@ -1,5 +1,5 @@
  /*
-** Copyright (C) 2008-2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+** Copyright (C) 2008-2024 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
 **
 ** This program is free software; you can redistribute it and/or modify it
 ** under the terms of the GNU General Public License as published by the
@@ -27,6 +27,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <signal.h>
+#include <sys/wait.h>
 
 #include "message/mu-message.hh"
 #include "mu-maildir.hh"