diff --git a/ExternalLibs/ttvfs/VFSDefines.h b/ExternalLibs/ttvfs/VFSDefines.h
index b5c0e41..d0cf3cc 100644
--- a/ExternalLibs/ttvfs/VFSDefines.h
+++ b/ExternalLibs/ttvfs/VFSDefines.h
@@ -21,24 +21,17 @@
 #define VFS_IGNORE_CASE
 
 
-// These are used for small, temporary memory allocations that can remain on the stack.
-// If alloca is available, this is the preferred way.
-#include <cstdlib>
-#ifdef _WIN32
-#  include <malloc.h> // MSVC/MinGW still need this for alloca. Seems to be windows-specific failure
-#endif
-#define VFS_STACK_ALLOC(size) alloca(size)
-#define VFS_STACK_FREE(ptr)   /* no need to free anything here */
-// Fail-safe:
-//#define VFS_STACK_ALLOC(size) malloc(size)
-//#define VFS_STACK_FREE(ptr)  free(ptr)
-
 /* --- End of config section --- */
 
 
 #define VFS_NAMESPACE_START namespace ttvfs {
 #define VFS_NAMESPACE_END }
 
+
+#if !defined(_MSC_VER)
+#  include <stdint.h>
+#endif
+
 VFS_NAMESPACE_START
 
 #ifdef VFS_LARGEFILE_SUPPORT
diff --git a/ExternalLibs/ttvfs/VFSDir.cpp b/ExternalLibs/ttvfs/VFSDir.cpp
index 211ced1..5d02839 100644
--- a/ExternalLibs/ttvfs/VFSDir.cpp
+++ b/ExternalLibs/ttvfs/VFSDir.cpp
@@ -138,7 +138,7 @@ void DirBase::forEachDir(DirEnumCallback f, void *user /* = NULL */, bool safe /
 
 DirBase *DirBase::getDirByName(const char *dn, bool /* unused: lazyLoad = true */, bool useSubtrees /* = true */)
 {
-    Dirs::const_iterator it = _subdirs.find(dn);
+    Dirs::iterator it = _subdirs.find(dn);
     return it != _subdirs.end() ? it->second : NULL;
 }
 
diff --git a/ExternalLibs/ttvfs/VFSFile.cpp b/ExternalLibs/ttvfs/VFSFile.cpp
index 431c40a..b5d2082 100644
--- a/ExternalLibs/ttvfs/VFSFile.cpp
+++ b/ExternalLibs/ttvfs/VFSFile.cpp
@@ -2,11 +2,12 @@
 // For conditions of distribution and use, see copyright notice in VFS.h
 
 #include "VFSInternal.h"
+#include <stdio.h> // for SEEK_* constants
+
 #include "VFSFile.h"
 #include "VFSTools.h"
 #include "VFSFileFuncs.h"
 
-#include <cstdio> // for SEEK_* constants
 
 VFS_NAMESPACE_START
 
@@ -74,12 +75,12 @@ vfspos DiskFile::getpos() const
     return _fh ? real_ftell((FILE*)_fh) : npos;
 }
 
-unsigned int DiskFile::read(void *dst, size_t bytes)
+size_t DiskFile::read(void *dst, size_t bytes)
 {
     return _fh ? real_fread(dst, 1, bytes, (FILE*)_fh) : 0;
 }
 
-unsigned int DiskFile::write(const void *src, size_t bytes)
+size_t DiskFile::write(const void *src, size_t bytes)
 {
     return _fh ? real_fwrite(src, 1, bytes, (FILE*)_fh) : 0;
 }
@@ -150,21 +151,21 @@ bool MemFile::seek(vfspos pos, int whence)
     return false;
 }
 
-unsigned int MemFile::read(void *dst, unsigned int bytes)
+size_t MemFile::read(void *dst, size_t bytes)
 {
     if(iseof())
         return 0;
-    unsigned int rem = std::min<unsigned int>((unsigned int)(_size - _pos), bytes);
+    size_t rem = std::min((size_t)(_size - _pos), bytes);
 
     memcpy(dst, (char*)_buf + _pos, rem);
     return rem;
 }
 
-unsigned int MemFile::write(const void *src, unsigned int bytes)
+size_t MemFile::write(const void *src, size_t bytes)
 {
     if(iseof())
         return 0;
-    unsigned int rem = std::min<unsigned int>((unsigned int)(_size - _pos), bytes);
+    size_t rem = std::min((size_t)(_size - _pos), bytes);
 
     memcpy((char*)_buf + _pos, src, rem);
     return rem;
diff --git a/ExternalLibs/ttvfs/VFSFileFuncs.cpp b/ExternalLibs/ttvfs/VFSFileFuncs.cpp
index 8543aa7..b6a749b 100644
--- a/ExternalLibs/ttvfs/VFSFileFuncs.cpp
+++ b/ExternalLibs/ttvfs/VFSFileFuncs.cpp
@@ -1,28 +1,21 @@
-#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
-#    define _CRT_SECURE_NO_WARNINGS
-#endif
-
 #include "VFSDefines.h"
-
-// this is for POSIX - define before including any stdio headers
-#ifdef VFS_LARGEFILE_SUPPORT
-#    ifndef _MSC_VER
-#        define _FILE_OFFSET_BITS 64
-#    endif
-#endif
-
-#include "VFSFileFuncs.h"
 #include "VFSInternal.h"
-
-#include <cstdio>
-
-// Compile time assertion to make sure things work as expected
-#if defined(VFS_LARGEFILE_SUPPORT) && !defined(_MSC_VER)
-static void _dummy_() { switch(0) { case 4: case sizeof(off_t): ; } }
-#endif
+#include "VFSFileFuncs.h"
 
 VFS_NAMESPACE_START
 
+// Compile time assertion to make sure things work as expected
+#if defined(VFS_LARGEFILE_SUPPORT)
+static void _dummy_()
+{
+    switch(0) { case 0:; case 4: case sizeof(vfspos): ; }
+#ifndef _MSC_VER
+    switch(0) { case 0:; case 4: case sizeof(off_t): ; }
+#endif
+}
+#endif
+
+
 void *real_fopen(const char *name, const char *mode)
 {
     return fopen(name, mode);
diff --git a/ExternalLibs/ttvfs/VFSInternal.h b/ExternalLibs/ttvfs/VFSInternal.h
index 37bd5a2..bcf8d78 100644
--- a/ExternalLibs/ttvfs/VFSInternal.h
+++ b/ExternalLibs/ttvfs/VFSInternal.h
@@ -13,21 +13,41 @@
 
 #include "VFSDefines.h"
 
-#include <cstdlib>
-#include <cstring>
-#include <string>
-#include <cassert>
-
+#if defined(VFS_LARGEFILE_SUPPORT)
+#  define _LARGEFILE_SOURCE
+#  define _LARGEFILE64_SOURCE
+#  define _FILE_OFFSET_BITS 64
+#endif
 
 #if _MSC_VER
 # ifndef _CRT_SECURE_NO_WARNINGS
 #   define _CRT_SECURE_NO_WARNINGS
 # endif
-#ifndef _CRT_SECURE_NO_DEPRECATE
+# ifndef _CRT_SECURE_NO_DEPRECATE
 #   define _CRT_SECURE_NO_DEPRECATE
+# endif
 #endif
-#   pragma warning(disable: 4355) // 'this' : used in base member initializer list
+
+// These are used for small, temporary memory allocations that can remain on the stack.
+// If alloca is available, this is the preferred way.
+#include <stdlib.h>
+#ifdef _WIN32
+#  include <malloc.h> // MSVC/MinGW still need this for alloca. Seems to be windows-specific failure
 #endif
+#define VFS_STACK_ALLOC(size) alloca(size)
+#define VFS_STACK_FREE(ptr)   /* no need to free anything here */
+// Fail-safe:
+//#define VFS_STACK_ALLOC(size) malloc(size)
+//#define VFS_STACK_FREE(ptr)  free(ptr)
+
+
+#include <string.h>
+#include <string>
+#include <assert.h>
+
+
+
+VFS_NAMESPACE_START
 
 template <typename DST, typename SRC> inline DST safecast(SRC p)
 {
@@ -45,5 +65,6 @@ template <typename DST, typename SRC> inline DST safecastNonNull(SRC p)
     return static_cast<DST>(p);
 }
 
+VFS_NAMESPACE_END
 
 #endif
diff --git a/ExternalLibs/ttvfs/VFSTools.cpp b/ExternalLibs/ttvfs/VFSTools.cpp
index a8f922d..f14022d 100644
--- a/ExternalLibs/ttvfs/VFSTools.cpp
+++ b/ExternalLibs/ttvfs/VFSTools.cpp
@@ -1,11 +1,11 @@
 // VFSTools.cpp - useful functions and misc stuff
 // For conditions of distribution and use, see copyright notice in VFS.h
 
+#include "VFSInternal.h"
 #include "VFSTools.h"
 
 #include <algorithm>
-#include <cctype>
-
+#include <ctype.h>
 
 #if _WIN32
 #   define WIN32_LEAN_AND_MEAN
@@ -273,19 +273,12 @@ bool CreateDirRec(const char *dir)
 bool GetFileSize(const char* fn, vfspos& size)
 {
     vfspos sz = 0;
-#ifdef VFS_LARGEFILE_SUPPORT
-# ifdef _MSC_VER
+#if defined(VFS_LARGEFILE_SUPPORT) && defined(_MSC_VER)
     struct _stat64 st;
     if(_stat64(fn, &st))
         return false;
     sz = st.st_size;
-# else // _MSC_VER
-    struct stat64 st;
-    if(stat64(fn, &st))
-        return false;
-    sz = st.st_size;
-# endif
-#else // VFS_LARGEFILE_SUPPORT
+#else
     struct stat st;
     if(stat(fn, &st))
         return false;
diff --git a/ExternalLibs/ttvfs/VFSTools.h b/ExternalLibs/ttvfs/VFSTools.h
index bbef7f8..2252ed5 100644
--- a/ExternalLibs/ttvfs/VFSTools.h
+++ b/ExternalLibs/ttvfs/VFSTools.h
@@ -7,7 +7,7 @@
 #ifndef VFS_TOOLS_H
 #define VFS_TOOLS_H
 
-#include <cstdlib>
+#include <stdlib.h>
 #include <deque>
 #include <string>
 
diff --git a/ExternalLibs/ttvfs_cfileapi/ttvfs_stdio.cpp b/ExternalLibs/ttvfs_cfileapi/ttvfs_stdio.cpp
index f8a58ef..a719192 100644
--- a/ExternalLibs/ttvfs_cfileapi/ttvfs_stdio.cpp
+++ b/ExternalLibs/ttvfs_cfileapi/ttvfs_stdio.cpp
@@ -124,7 +124,7 @@ bool InStream::open(const char *fn)
 
 int ttvfs_stdio_fsize(VFILE *f, size_t *sizep)
 {
-    size_t sz = 0;
+    long int sz = 0;
     if (  vfseek(f, 0, SEEK_END) != 0
        || (sz = vftell(f)) < 0
        || vfseek(f, 0, SEEK_SET) != 0)
diff --git a/ExternalLibs/ttvfs_zip/VFSFileZip.cpp b/ExternalLibs/ttvfs_zip/VFSFileZip.cpp
index 7eb5b0b..bc76a47 100644
--- a/ExternalLibs/ttvfs_zip/VFSFileZip.cpp
+++ b/ExternalLibs/ttvfs_zip/VFSFileZip.cpp
@@ -98,23 +98,20 @@ vfspos ZipFile::getpos() const
     return _pos;
 }
 
-unsigned int ZipFile::read(void *dst, unsigned int bytes)
+size_t ZipFile::read(void *dst, size_t bytes)
 {
     if(!_buf && !unpack())
         return 0;
 
     char *startptr = _buf + _pos;
     char *endptr = _buf + size();
-    bytes = std::min((unsigned int)(endptr - startptr), bytes); // limit in case reading over buffer size
-    //if(_mode.find('b') == std::string::npos)
-    //    strnNLcpy((char*)dst, (const char*)startptr, bytes); // non-binary == text mode
-    //else
-        memcpy(dst, startptr, bytes); //  binary copy
+    bytes = std::min<size_t>(endptr - startptr, bytes); // limit in case reading over buffer size
+    memcpy(dst, startptr, bytes); //  binary copy
     _pos += bytes;
     return bytes;
 }
 
-unsigned int ZipFile::write(const void *src, unsigned int bytes)
+size_t ZipFile::write(const void *src, size_t bytes)
 {
     // TODO: implement actually writing to the underlying Zip file.
 
diff --git a/ExternalLibs/ttvfs_zip/VFSFileZip.h b/ExternalLibs/ttvfs_zip/VFSFileZip.h
index 108e65f..0ba0a22 100644
--- a/ExternalLibs/ttvfs_zip/VFSFileZip.h
+++ b/ExternalLibs/ttvfs_zip/VFSFileZip.h
@@ -18,8 +18,8 @@ public:
     virtual bool seek(vfspos pos, int whence);
     virtual bool flush();
     virtual vfspos getpos() const;
-    virtual unsigned int read(void *dst, unsigned int bytes);
-    virtual unsigned int write(const void *src, unsigned int bytes);
+    virtual size_t read(void *dst, size_t bytes);
+    virtual size_t write(const void *src, size_t bytes);
     virtual vfspos size();
     virtual const char *getType() const { return "ZipFile"; }