diff --git a/Descent3/BriefingParse.h b/Descent3/BriefingParse.h
index df74a2d2..5eae21c1 100644
--- a/Descent3/BriefingParse.h
+++ b/Descent3/BriefingParse.h
@@ -50,9 +50,7 @@
 #ifndef __BRIEFPARSE_H_
 #define __BRIEFPARSE_H_
 
-#if defined(POSIX)
-#include "linux_fix.h" //for stricmp
-#endif
+#include "crossplat.h" //for stricmp
 
 #include "TelComEfxStructs.h"
 #include "grdefs.h"
diff --git a/Descent3/credits.cpp b/Descent3/credits.cpp
index 78936555..307e3aa4 100644
--- a/Descent3/credits.cpp
+++ b/Descent3/credits.cpp
@@ -77,8 +77,11 @@
  * $NoKeywords: $
  */
 
+#include <cstring>
+
 #include "mono.h"
 #include "pstypes.h"
+#include "crossplat.h"
 #include "ddio.h"
 #include "grtext.h"
 #include "renderer.h"
@@ -87,17 +90,10 @@
 #include "bitmap.h"
 #include "descent.h"
 #include "mem.h"
-#include "3d.h"
 #include "d3music.h"
 #include "hlsoundlib.h"
-#include <string.h>
-#include <math.h>
 #include "psrand.h"
 
-#if defined(POSIX)
-#include "linux_fix.h"
-#endif
-
 /*
 $$TABLE_GAMEFILE "GameCredits.txt"
 $$TABLE_GAMEFILE "credits.omf"
diff --git a/Descent3/dedicated_server.cpp b/Descent3/dedicated_server.cpp
index 664cfaa2..9b133ab6 100644
--- a/Descent3/dedicated_server.cpp
+++ b/Descent3/dedicated_server.cpp
@@ -112,31 +112,25 @@
 typedef int socklen_t;
 #endif
 
-#include "pstypes.h"
+#include "crossplat.h"
 #include "pserror.h"
 #include "pstring.h"
-#include "cfile.h"
 #include "inffile.h"
 #include "dedicated_server.h"
 #include "multi.h"
 #include "args.h"
 #include "AppConsole.h"
 #include "ddio.h"
-#include "newui.h"
-#include "ui.h"
 #include "multi_dll_mgr.h"
 #include "multi_ui.h"
 #include "Mission.h"
 #include "multi_server.h"
-#include "Macros.h"
-#include "game.h"
 #include "mem.h"
 #include "stringtable.h"
 #include "multi_save_settings.h"
 #include "objinfo.h"
 #include "rtperformance.h"
 #include "player.h"
-#include "stringtable.h"
 #include "init.h"
 #include "ship.h"
 #include "hud.h"
@@ -794,7 +788,6 @@ void PrintDedicatedMessage(const char *fmt, ...) {
 #include <sys/socket.h>
 #include <unistd.h>
 
-#include "linux_fix.h"
 #include "errno.h"
 #define BOOL bool
 #ifndef SOCKET
diff --git a/Descent3/descent.h b/Descent3/descent.h
index 6b446f19..0e4ad4d8 100644
--- a/Descent3/descent.h
+++ b/Descent3/descent.h
@@ -132,10 +132,7 @@
 #include <filesystem>
 
 #include "application.h"
-
-#if defined(POSIX)
-#include "linux_fix.h"
-#endif
+#include "crossplat.h"
 
 // The name of this product
 #ifdef DEMO
diff --git a/cfile/cfile.cpp b/cfile/cfile.cpp
index 7f442f1c..7ad0478c 100644
--- a/cfile/cfile.cpp
+++ b/cfile/cfile.cpp
@@ -22,21 +22,13 @@
 #include <cstring>
 #include <cstdarg>
 #include <cerrno>
-#include <cctype>
 #include <filesystem>
 #include <map>
 #include <memory>
 #include <vector>
 
-#if !defined(POSIX)
-// Non-Linux Build Includes
-#include <io.h>
-#else
-// Linux Build Includes
-#include "linux_fix.h"
-#endif
-
 #include "byteswap.h"
+#include "crossplat.h"
 #include "pserror.h"
 #include "ddio.h"
 #include "psglob.h"
diff --git a/cfile/inffile.h b/cfile/inffile.h
index beaa40de..50c9d26b 100644
--- a/cfile/inffile.h
+++ b/cfile/inffile.h
@@ -30,7 +30,7 @@
 #include <filesystem>
 
 #include "cfile.h"
-#include "pstypes.h"
+#include "crossplat.h"
 #include "psclass.h"
 
 enum InfFileError {
diff --git a/ddio/lnxfile.cpp b/ddio/lnxfile.cpp
index 08d34b51..74a48385 100644
--- a/ddio/lnxfile.cpp
+++ b/ddio/lnxfile.cpp
@@ -73,7 +73,7 @@
 #endif
 
 #include "ddio.h"
-#include "linux_fix.h"
+#include "crossplat.h"
 #include "mem.h"
 #include "pserror.h"
 
diff --git a/legacy/briefinglocalizer/briefinglocalizerDlg.cpp b/legacy/briefinglocalizer/briefinglocalizerDlg.cpp
index 2447c9c3..2abe4daf 100644
--- a/legacy/briefinglocalizer/briefinglocalizerDlg.cpp
+++ b/legacy/briefinglocalizer/briefinglocalizerDlg.cpp
@@ -23,9 +23,7 @@
 #include "briefinglocalizer.h"
 #include "briefinglocalizerDlg.h"
 
-#if defined(POSIX)
-#include "linux_fix.h"
-#endif
+#include "crossplat.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/legacy/renderer/opengl.cpp b/legacy/renderer/opengl.cpp
index d8b0990a..569db09e 100644
--- a/legacy/renderer/opengl.cpp
+++ b/legacy/renderer/opengl.cpp
@@ -20,7 +20,7 @@
 #include <windows.h>
 #include "ddraw.h"
 #elif defined(POSIX)
-#include "linux_fix.h"
+#include "crossplat.h"
 #include "lnxscreenmode.h"
 #else
 #endif
diff --git a/lib/bitmap.h b/lib/bitmap.h
index d2b71dc9..09c3632e 100644
--- a/lib/bitmap.h
+++ b/lib/bitmap.h
@@ -22,10 +22,7 @@
 #include <filesystem>
 
 #include "cfile.h"
-
-#if defined(POSIX)
-#include "linux_fix.h" //needed for stricmp's throughout bitmap lib
-#endif
+#include "crossplat.h" //needed for stricmp's throughout bitmap lib
 
 #define MAX_BITMAPS 5000
 #define NUM_MIP_LEVELS 5
diff --git a/lib/crossplat.h b/lib/crossplat.h
new file mode 100644
index 00000000..f153a503
--- /dev/null
+++ b/lib/crossplat.h
@@ -0,0 +1,65 @@
+/*
+ * Descent 3
+ * Copyright (C) 2024 Parallax Software
+ * Copyright (C) 2024 Descent Developers
+ *
+ * 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 Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CROSSPLAT_H_
+#define CROSSPLAT_H_
+
+// Crossplatform stubs and replacements
+
+#if defined(WIN32)
+
+#include <cstring> // strupr, stricmp, strnicmp
+#include <cstdlib> // _MAX_PATH, _MAX_FNAME, _MAX_EXT for WIN32
+#include <io.h>    // _chmod
+
+#elif defined(POSIX)
+
+#include <cctype>      // toupper
+#include <cstring>     // strcasecmp, strncasecmp
+#include <sys/stat.h>  // chmod
+
+inline char *strupr(char *string) {
+  while (string && *string) {
+    *string = toupper(*string);
+    string++;
+  }
+  return string;
+}
+
+// Replace missing defines from stdlib.h
+#define _MAX_PATH 260  /* max. length of full pathname*/
+#define _MAX_FNAME 256 /* max. length of path component*/
+#define _MAX_EXT 256   /* max. length of extension component*/
+
+// _cdecl replacement
+#define __cdecl __attribute__((cdecl))
+// __stdcall replacement
+#define __stdcall __attribute__((stdcall))
+
+#define stricmp(a, b) strcasecmp(a, b)
+#define strnicmp(a, b, c) strncasecmp(a, b, c)
+#define _chmod(a, b) chmod(a, b)
+
+#else
+
+#error "Unknown platform!"
+
+#endif
+
+#endif
diff --git a/linux/CMakeLists.txt b/linux/CMakeLists.txt
index 9063cc6f..0efd06c3 100644
--- a/linux/CMakeLists.txt
+++ b/linux/CMakeLists.txt
@@ -1,5 +1,4 @@
 set(HEADERS
-  linux_fix.h
   lnxapp.h
   lnxcontroller.h
   registry.h)
diff --git a/linux/linux_fix.h b/linux/linux_fix.h
deleted file mode 100644
index cb98046d..00000000
--- a/linux/linux_fix.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
-* Descent 3
-* Copyright (C) 2024 Parallax Software
-*
-* 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 Free Software Foundation, either version 3 of the License, or
-* (at your option) any later version.
-*
-* This program is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-* GNU General Public License for more details.
-*
-* You should have received a copy of the GNU General Public License
-* along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef __LINUX_FIX_H_
-#define __LINUX_FIX_H_
-
-#include <cstring>
-#include <sys/stat.h>
-
-#define LOKI_VERSION ""
-
-#define HGLOBAL void *
-
-char *strupr(char *string);
-
-#define _stat stat
-
-// Replace missing defines from stdlib.h
-#define _MAX_PATH 260  /* max. length of full pathname*/
-#define _MAX_FNAME 256 /* max. length of path component*/
-#define _MAX_EXT 256   /* max. length of extension component*/
-
-// _cdecl replacement
-#define __cdecl __attribute__((cdecl))
-// __stdcall replacement
-#define __stdcall __attribute__((stdcall))
-
-#define stricmp(a, b) strcasecmp(a, b)
-#define strnicmp(a, b, c) strncasecmp(a, b, c)
-#define _chmod(a, b) chmod(a, b)
-#endif
diff --git a/linux/lnxapp.cpp b/linux/lnxapp.cpp
index 2a03a526..bd6ceed8 100644
--- a/linux/lnxapp.cpp
+++ b/linux/lnxapp.cpp
@@ -69,7 +69,6 @@
  */
 
 #include <cstdlib>
-#include <cctype>
 #if defined(POSIX)
 #include <termios.h>
 #else
@@ -95,14 +94,6 @@ bool con_Create(int flags);
 void con_Destroy();
 void con_Defer();
 
-char *strupr(char *string) {
-  while (string && *string) {
-    *string = toupper(*string);
-    string++;
-  }
-  return string;
-}
-
 static uint32_t LinuxAppFlags = 0;
 // static Display *LinuxAppDisplay=NULL;
 static bool LinuxAppSetAtExit = false;
diff --git a/module/module.cpp b/module/module.cpp
index 2477da28..c346444a 100644
--- a/module/module.cpp
+++ b/module/module.cpp
@@ -99,9 +99,9 @@
 
 #if defined(POSIX)
 #include <dlfcn.h>
-#include "linux_fix.h"
 #endif
 
+#include "crossplat.h"
 #include "module.h"
 #include "pserror.h"
 
diff --git a/netcon/includes/con_dll.h b/netcon/includes/con_dll.h
index 75eebf9e..fe4f73b9 100644
--- a/netcon/includes/con_dll.h
+++ b/netcon/includes/con_dll.h
@@ -270,14 +270,10 @@
 #include <regex>
 #include <string>
 
+#include "crossplat.h"
 #include "ship.h"
 #include "pstypes.h"
 
-#if defined(POSIX)
-#include <cstring>
-#include "linux_fix.h"
-#endif
-
 // Uncomment out this line of code to build the demo version of the multiplayer connection dlls
 // #define DEMO	1
 
diff --git a/netcon/includes/inetgetfile.h b/netcon/includes/inetgetfile.h
index af4f1474..f0c6ec01 100644
--- a/netcon/includes/inetgetfile.h
+++ b/netcon/includes/inetgetfile.h
@@ -97,7 +97,6 @@
 #include <sys/time.h>
 #include <unistd.h>
 
-#include "linux_fix.h"
 
 // Linux includes/defines
 #if defined(__LINUX__)
diff --git a/netcon/inetfile/CFtp.cpp b/netcon/inetfile/CFtp.cpp
index 5ab9471f..dfeef42b 100644
--- a/netcon/inetfile/CFtp.cpp
+++ b/netcon/inetfile/CFtp.cpp
@@ -70,9 +70,9 @@
 typedef int socklen_t;
 #endif
 
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
+#include <cstring>
+#include <cstdio>
+#include <cstdlib>
 
 #if defined(POSIX)
 // sorry, I'm lazy, I guess we could copy the defines
@@ -82,6 +82,7 @@ typedef int socklen_t;
 #endif
 
 #include "CFtp.h"
+#include "crossplat.h"
 
 // MTS: only used in this file?
 #if defined(POSIX)
diff --git a/netcon/inetfile/Chttpget.cpp b/netcon/inetfile/Chttpget.cpp
index 5cdf46ba..32731308 100644
--- a/netcon/inetfile/Chttpget.cpp
+++ b/netcon/inetfile/Chttpget.cpp
@@ -124,14 +124,15 @@
 #include <process.h>
 #endif
 
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
+#include <cstring>
+#include <cstdio>
+#include <cstdlib>
 
 #include "inetgetfile.h"
 #include "Chttpget.h"
 
 #include "chrono_timer.h"
+#include "crossplat.h"
 #include "mem.h"
 
 #define NW_AGHBN_CANCEL 1
diff --git a/netcon/mtclient/chat_api.cpp b/netcon/mtclient/chat_api.cpp
index 2da78170..658f107a 100644
--- a/netcon/mtclient/chat_api.cpp
+++ b/netcon/mtclient/chat_api.cpp
@@ -26,10 +26,10 @@
 #if defined(POSIX)
 #include <sys/time.h>
 #include <unistd.h>
-#include "linux_fix.h"
 #endif
 
 #include "chat_api.h"
+#include "crossplat.h"
 #include "grdefs.h"
 #include "mtstrings.h"
 #include "networking.h"
diff --git a/netcon/mtclient/mtpilottracker.cpp b/netcon/mtclient/mtpilottracker.cpp
index c355dc0f..25e7cf80 100644
--- a/netcon/mtclient/mtpilottracker.cpp
+++ b/netcon/mtclient/mtpilottracker.cpp
@@ -114,10 +114,7 @@
 #include "networking.h"
 #include "mt_net.h"
 #include "byteswap.h"
-
-#if defined(POSIX)
-#include "linux_fix.h"
-#endif
+#include "crossplat.h"
 
 #define LOGIN_LEN 33
 #define REAL_NAME_LEN 66
diff --git a/scripts/linux_lib.h b/scripts/linux_lib.h
index b8b3db50..def92648 100644
--- a/scripts/linux_lib.h
+++ b/scripts/linux_lib.h
@@ -22,7 +22,8 @@
 #include <cstdio>
 #include <cstdlib>
 #include <cstdarg>
-#include "linux_fix.h"
+
+#include "crossplat.h"  // for stricmp
 
 void _splitpath(const char *path, char *drive, char *dir, char *fname, char *ext);