From dc10ed62afe8b35f03ef8e6603ea36b89f15a7e8 Mon Sep 17 00:00:00 2001
From: Nazarenko Mykyta Volodymyrovych <mykyta@nazarenko.sbs>
Date: Fri, 4 Sep 2026 09:54:52 +0000
Subject: [PATCH 1/4] [ OpenBSD ] -> #include <sys/wait.h>

---
 src/auth.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/auth.cpp b/src/auth.cpp
index ab8f910..3a7438a 100644
--- a/src/auth.cpp
+++ b/src/auth.cpp
@@ -13,6 +13,10 @@
 
 #include <sys/time.h>
 
+#if defined(__OpenBSD__)
+#include <sys/wait.h>
+#endif
+
 #include "cacheutil.h"
 #include "config.h"
 #include "crypto.h"

From 9c95d4cea4d4eac0c4bcbe576da164b6e74a7dbc Mon Sep 17 00:00:00 2001
From: Nazarenko Mykyta Volodymyrovych <mykyta@nazarenko.sbs>
Date: Fri, 4 Sep 2026 09:56:16 +0000
Subject: [PATCH 2/4] [ OpenBSD ] -> #include <cstdarg>

---
 src/log.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/log.h b/src/log.h
index 342ca36..63aa0eb 100644
--- a/src/log.h
+++ b/src/log.h
@@ -7,6 +7,10 @@
 
 #pragma once
 
+#if defined(__OpenBSD__)
+#include <cstdarg>
+#endif
+
 #include <mutex>
 #include <string>
 

From c5ffbe070fe38b0db38ffa27a98d67e2c6678fd3 Mon Sep 17 00:00:00 2001
From: Nazarenko Mykyta Volodymyrovych <mykyta@nazarenko.sbs>
Date: Fri, 4 Sep 2026 10:18:03 +0000
Subject: [PATCH 3/4] [ OpenBSD ] -> Use glob instead of wordexp

---
 src/util.cpp | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/util.cpp b/src/util.cpp
index e1e8a92..19eda68 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -26,7 +26,13 @@
 #include <netdb.h>
 #include <termios.h>
 #include <unistd.h>
+
+#if defined(__OpenBSD__)
+#include <string>
+#include <sys/glob.h>
+#else
 #include <wordexp.h>
+#endif
 
 #include <sys/resource.h>
 #include <sys/socket.h>
@@ -140,6 +146,23 @@ std::string Util::ExpandPath(const std::string& p_Path)
 
   if ((p_Path.at(0) != '~') && ((p_Path.at(0) != '$'))) return p_Path;
 
+#if defined(__OpenBSD__)
+  glob_t gl;
+  std::string rv;
+  if ((glob(p_Path.c_str(), GLOB_TILDE | GLOB_NOCHECK, nullptr, &gl) == 0) && (gl.gl_pathc > 0))
+  {
+    rv = std::string(gl.gl_pathv[0]);
+    for (size_t i = 1; i < gl.gl_pathc; ++i)
+    {
+      rv += " " + std::string(gl.gl_pathv[i]);
+    }
+    globfree(&gl);
+  }
+  else
+  {
+    rv = p_Path;
+  }
+#else
   wordexp_t exp;
   std::string rv;
   if ((wordexp(p_Path.c_str(), &exp, WRDE_NOCMD) == 0) && (exp.we_wordc > 0))
@@ -155,7 +178,7 @@ std::string Util::ExpandPath(const std::string& p_Path)
   {
     rv = p_Path;
   }
-
+#endif
   return rv;
 }
 

From dd0c5a0bcb555aa2d1c57e24b1e5033adea8e4f3 Mon Sep 17 00:00:00 2001
From: Kristofer Berggren <kristofer.berggren@gmail.com>
Date: Sat, 12 Sep 2026 14:35:53 +0800
Subject: [PATCH 4/4] follow-up openbsd build fixes - bump version

---
 src/nmail.1     | 2 +-
 src/version.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nmail.1 b/src/nmail.1
index 342785a..2f29370 100644
--- a/src/nmail.1
+++ b/src/nmail.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
-.TH NMAIL "1" "September 2026" "nmail 5.16.3" "User Commands"
+.TH NMAIL "1" "September 2026" "nmail 5.16.4" "User Commands"
 .SH NAME
 nmail \- ncurses mail
 .SH SYNOPSIS
diff --git a/src/version.cpp b/src/version.cpp
index 0342a77..955da9a 100644
--- a/src/version.cpp
+++ b/src/version.cpp
@@ -9,7 +9,7 @@
 
 #include "buildinfo.h"
 
-#define NMAIL_VERSION "5.16.3"
+#define NMAIL_VERSION "5.16.4"
 
 std::string Version::GetBuildOs()
 {