diff --git a/extra/yassl/include/buffer.hpp b/extra/yassl/include/buffer.hpp
index 126bdbc19b7..cdf44ee60a5 100644
--- a/extra/yassl/include/buffer.hpp
+++ b/extra/yassl/include/buffer.hpp
@@ -27,7 +27,7 @@
 #ifndef yaSSL_BUFFER_HPP
 #define yaSSL_BUFFER_HPP
 
-#include <cassert>              // assert
+#include <assert.h>             // assert
 #include "yassl_error.hpp"      // Error
 #include "memory.hpp"           // mySTL::auto_ptr
 #include "algorithm.hpp"        // mySTL::swap
diff --git a/extra/yassl/include/log.hpp b/extra/yassl/include/log.hpp
index 5753bb4502d..c20116901ad 100644
--- a/extra/yassl/include/log.hpp
+++ b/extra/yassl/include/log.hpp
@@ -30,7 +30,7 @@
 #include "socket_wrapper.hpp"
 
 #ifdef YASSL_LOG
-#include <cstdio>
+#include <stdio.h>
 #endif
 
 namespace yaSSL {
diff --git a/extra/yassl/include/socket_wrapper.hpp b/extra/yassl/include/socket_wrapper.hpp
index dddbd65e220..2a4ac142ec8 100644
--- a/extra/yassl/include/socket_wrapper.hpp
+++ b/extra/yassl/include/socket_wrapper.hpp
@@ -29,7 +29,7 @@
 #ifndef yaSSL_SOCKET_WRAPPER_HPP
 #define yaSSL_SOCKET_WRAPPER_HPP
 
-#include <cassert>
+#include <assert.h>
 
 #ifdef WIN32
     #include <winsock2.h>
diff --git a/extra/yassl/mySTL/helpers.hpp b/extra/yassl/mySTL/helpers.hpp
index 1b62d60cd2e..10f120e914b 100644
--- a/extra/yassl/mySTL/helpers.hpp
+++ b/extra/yassl/mySTL/helpers.hpp
@@ -27,7 +27,7 @@
 #ifndef mySTL_HELPERS_HPP
 #define mySTL_HELPERS_HPP
 
-#include <cstdlib>
+#include <stdlib.h>
 
 
 namespace mySTL {
diff --git a/extra/yassl/mySTL/stdexcept.hpp b/extra/yassl/mySTL/stdexcept.hpp
index 817861438a5..7b797f43c2b 100644
--- a/extra/yassl/mySTL/stdexcept.hpp
+++ b/extra/yassl/mySTL/stdexcept.hpp
@@ -28,7 +28,7 @@
 #define mySTL_STDEXCEPT_HPP
 
 
-#include <cstring>  // strncpy
+#include <string.h>  // strncpy
 
 
 namespace mySTL {
diff --git a/extra/yassl/mySTL/vector.hpp b/extra/yassl/mySTL/vector.hpp
index 7f1f99295e4..6d5a9b6c057 100644
--- a/extra/yassl/mySTL/vector.hpp
+++ b/extra/yassl/mySTL/vector.hpp
@@ -31,7 +31,7 @@
 #include "helpers.hpp"    // construct, destory, fill, etc.
 #include "algorithm.hpp"  // swap
 #include <new>            // ::operator new and delete, placement too
-#include <cassert>        // assert
+#include <assert.h>       // assert
 
 
 namespace mySTL {
diff --git a/extra/yassl/src/ssl.cpp b/extra/yassl/src/ssl.cpp
index 065b3c260bf..53bd8a75ab6 100644
--- a/extra/yassl/src/ssl.cpp
+++ b/extra/yassl/src/ssl.cpp
@@ -36,7 +36,7 @@
 #include "openssl/ssl.h"
 #include "handshake.hpp"
 #include "yassl_int.hpp"
-#include <cstdio>
+#include <stdio.h>
 
 
 namespace yaSSL {
diff --git a/extra/yassl/taocrypt/include/block.hpp b/extra/yassl/taocrypt/include/block.hpp
index 6e96ec9cc35..f490fb0b6e7 100644
--- a/extra/yassl/taocrypt/include/block.hpp
+++ b/extra/yassl/taocrypt/include/block.hpp
@@ -31,7 +31,7 @@
 #include "stdexcept.hpp"    // mySTL::runtime_error
 #include "misc.hpp"
 #include <string.h>         // memcpy
-#include <cstddef>          // ptrdiff_t
+#include <stddef.h>         // ptrdiff_t
 
 
 #if defined(_MSC_VER) && defined(_CRTAPI1)
@@ -49,11 +49,7 @@ class AllocatorBase
 public:
     typedef T      value_type;
     typedef size_t size_type;
-#ifdef TAOCRYPT_MSVCRT6
     typedef ptrdiff_t      difference_type;
-#else
-    typedef std::ptrdiff_t difference_type;
-#endif
     typedef T*       pointer;
     typedef const T* const_pointer;
     typedef T&       reference;
diff --git a/extra/yassl/taocrypt/include/file.hpp b/extra/yassl/taocrypt/include/file.hpp
index b27ab3aebf3..fe7e1073c99 100644
--- a/extra/yassl/taocrypt/include/file.hpp
+++ b/extra/yassl/taocrypt/include/file.hpp
@@ -29,7 +29,7 @@
 #include "misc.hpp"
 #include "block.hpp"
 #include "error.hpp"
-#include <cstdio>
+#include <stdio.h>
 
 namespace TaoCrypt {
 
diff --git a/extra/yassl/taocrypt/include/integer.hpp b/extra/yassl/taocrypt/include/integer.hpp
index 94383f8061d..3713d09d9f9 100644
--- a/extra/yassl/taocrypt/include/integer.hpp
+++ b/extra/yassl/taocrypt/include/integer.hpp
@@ -29,7 +29,7 @@
 #include "block.hpp"
 #include "random.hpp"
 #include "file.hpp"
-#include <cstring>
+#include <string.h>
 #include "algorithm.hpp"    // mySTL::swap
 
 
diff --git a/extra/yassl/taocrypt/include/runtime.hpp b/extra/yassl/taocrypt/include/runtime.hpp
index e2c04af44f4..43f1b72fd51 100644
--- a/extra/yassl/taocrypt/include/runtime.hpp
+++ b/extra/yassl/taocrypt/include/runtime.hpp
@@ -31,7 +31,7 @@
 
 #if __GNUC__ > 2
 
-#include <cstdlib>
+#include <stdlib.h>
 
 
 static void* operator new (size_t sz)
diff --git a/extra/yassl/taocrypt/src/dh.cpp b/extra/yassl/taocrypt/src/dh.cpp
index e5a6a562c52..af50d471b52 100644
--- a/extra/yassl/taocrypt/src/dh.cpp
+++ b/extra/yassl/taocrypt/src/dh.cpp
@@ -26,7 +26,7 @@
 #include "runtime.hpp"
 #include "dh.hpp"
 #include "asn.hpp"
-#include <cmath>
+#include <math.h>
 
 namespace TaoCrypt {