diff --git a/source/lib/config.h b/source/lib/config.h
index fb8c2de4f4..78e6e09b1c 100644
--- a/source/lib/config.h
+++ b/source/lib/config.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -52,9 +52,4 @@
 # define CONFIG_ENABLE_CHECKS 0
 #endif
 
-// allow the use of Boost? (affects PCH and several individual modules)
-#ifndef CONFIG_ENABLE_BOOST
-# define CONFIG_ENABLE_BOOST 1
-#endif
-
 #endif	// #ifndef INCLUDED_CONFIG
diff --git a/source/lib/precompiled.h b/source/lib/precompiled.h
index 4652fadf98..9ef085a412 100644
--- a/source/lib/precompiled.h
+++ b/source/lib/precompiled.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2022 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -36,7 +36,7 @@
 # define MINIMAL_PCH 0
 #endif
 
-#include "lib/config.h"	            // CONFIG_ENABLE_BOOST, CONFIG_ENABLE_PCH
+#include "lib/config.h"	            // CONFIG_ENABLE_PCH
 #include "lib/sysdep/compiler.h"    // MSC_VERSION
 
 // must come before any STL headers are included
@@ -74,9 +74,7 @@ double __cdecl abs(double x);	// not declared by mathimf
 #include "lib/lib.h"
 #include "lib/secure_crt.h"
 
-#if CONFIG_ENABLE_BOOST
-# include "lib/pch/pch_boost.h"
-#endif
+#include "lib/pch/pch_boost.h"
 
 #include <array>
 #include <memory>
diff --git a/source/lib/sysdep/os/win/wsysdep.cpp b/source/lib/sysdep/os/win/wsysdep.cpp
index 6c59b3a726..ad6a84d486 100644
--- a/source/lib/sysdep/os/win/wsysdep.cpp
+++ b/source/lib/sysdep/os/win/wsysdep.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2023 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -39,10 +39,8 @@
 #include "lib/sysdep/os/win/error_dialog.h"
 #include "lib/sysdep/os/win/wutil.h"
 
-#if CONFIG_ENABLE_BOOST
-# include <boost/algorithm/string/classification.hpp>
-# include <boost/algorithm/string/split.hpp>
-#endif
+#include <boost/algorithm/string/classification.hpp>
+#include <boost/algorithm/string/split.hpp>
 
 #include <string_view>
 
@@ -523,8 +521,6 @@ Status sys_generate_random_bytes(u8* buffer, size_t size)
 }
 
 
-#if CONFIG_ENABLE_BOOST
-
 /*
  * Given a string of the form
  *   "example.com:80"
@@ -635,8 +631,6 @@ done:
 	return err;
 }
 
-#endif
-
 FILE* sys_OpenFile(const OsPath& pathname, const char* mode)
 {
 	FILE* f = 0;