diff --git a/engine/client/identification.c b/engine/client/identification.c
index 6b80dbdc..2b1a8127 100644
--- a/engine/client/identification.c
+++ b/engine/client/identification.c
@@ -18,6 +18,8 @@ GNU General Public License for more details.
 #include <fcntl.h>
 #if !XASH_WIN32
 #include <dirent.h>
+#else
+#include <io.h>
 #endif
 
 static char id_md5[33];
diff --git a/engine/common/filesystem_engine.c b/engine/common/filesystem_engine.c
index 3e7b355a..6bd2eb7d 100644
--- a/engine/common/filesystem_engine.c
+++ b/engine/common/filesystem_engine.c
@@ -27,6 +27,10 @@ GNU General Public License for more details.
 #include "library.h"
 #include "platform/platform.h"
 
+#if XASH_WIN32
+#include <direct.h>
+#endif
+
 static CVAR_DEFINE_AUTO( fs_mount_hd, "0", FCVAR_PRIVILEGED, "mount high definition content folder" );
 static CVAR_DEFINE_AUTO( fs_mount_lv, "0", FCVAR_PRIVILEGED, "mount low violence models content folder" );
 static CVAR_DEFINE_AUTO( fs_mount_addon, "0", FCVAR_PRIVILEGED, "mount addon content folder" );
diff --git a/engine/common/sys_con.c b/engine/common/sys_con.c
index d7e09dd5..8a261dc4 100644
--- a/engine/common/sys_con.c
+++ b/engine/common/sys_con.c
@@ -23,6 +23,9 @@ GNU General Public License for more details.
 #include <sys/time.h>
 #endif
 #include "xash3d_mathlib.h"
+#if XASH_WIN32
+#include <io.h>
+#endif
 
 // do not waste precious CPU cycles on mobiles or low memory devices
 #if !XASH_WIN32 && !XASH_MOBILE_PLATFORM && !XASH_LOW_MEMORY && !XASH_EMSCRIPTEN
diff --git a/engine/platform/win32/lib_win.c b/engine/platform/win32/lib_win.c
index f46a80de..cf774ad7 100644
--- a/engine/platform/win32/lib_win.c
+++ b/engine/platform/win32/lib_win.c
@@ -17,6 +17,7 @@ GNU General Public License for more details.
 
 #if XASH_LIB == LIB_WIN32
 #include "lib_win.h"
+#include "utflib.h"
 
 static const wchar_t *FS_PathToWideChar( const char *path )
 {
diff --git a/filesystem/filesystem.c b/filesystem/filesystem.c
index 9cd69595..8f0dc7da 100644
--- a/filesystem/filesystem.c
+++ b/filesystem/filesystem.c
@@ -27,6 +27,7 @@ GNU General Public License for more details.
 #if XASH_WIN32
 #include <direct.h>
 #include <io.h>
+#include "utflib.h"
 #elif XASH_DOS4GW
 #include <direct.h>
 #else