diff --git a/reactos/dll/win32/rpcrt4_new/rpcrt4_ros.diff b/reactos/dll/win32/rpcrt4_new/rpcrt4_ros.diff
new file mode 100644
index 00000000000..595706b0b60
--- /dev/null
+++ b/reactos/dll/win32/rpcrt4_new/rpcrt4_ros.diff
@@ -0,0 +1,101 @@
+Index: rpc_transport.c
+===================================================================
+--- rpc_transport.c	(revision 27793)
++++ rpc_transport.c	(working copy)
+@@ -56,9 +56,6 @@
+ #include <sys/poll.h>
+ #endif
+ 
+-#include <winsock2.h>
+-#include <ws2tcpip.h>
+-
+ #include "windef.h"
+ #include "winbase.h"
+ #include "winnls.h"
+@@ -76,8 +73,6 @@
+ #include "rpc_server.h"
+ #include "epm_towers.h"
+ 
+-#include "unix_func.h"
+-
+ #ifndef SOL_TCP
+ # define SOL_TCP IPPROTO_TCP
+ #endif
+@@ -781,7 +776,7 @@
+ 
+     /* RPC depends on having minimal latency so disable the Nagle algorithm */
+     val = 1;
+-    setsockopt(sock, SOL_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
++    setsockopt(sock, SOL_TCP, TCP_NODELAY, &val, sizeof(val));
+ 
+     tcpc->sock = sock;
+ 
+@@ -804,7 +799,6 @@
+     struct addrinfo *ai_cur;
+     struct addrinfo hints;
+     RpcConnection *first_connection = NULL;
+-    u_long blocking;
+ 
+     TRACE("(%p, %s)\n", protseq, endpoint);
+ 
+@@ -855,7 +849,7 @@
+         {
+             WARN("bind failed: %s\n", strerror(errno));
+             close(sock);
+-            if (errno == WSAEADDRINUSE)
++            if (errno == EADDRINUSE)
+               status = RPC_S_DUPLICATE_ENDPOINT;
+             else
+               status = RPC_S_CANT_CREATE_ENDPOINT;
+@@ -884,8 +878,7 @@
+          * race-condition (poll() says it is readable, connection drops,
+          * and accept() blocks until the next connection comes...)
+          */
+-        blocking = 1;
+-        ret = ioctlsocket(sock, FIONBIO, &blocking);
++        ret = fcntl(sock, F_SETFL, O_NONBLOCK);
+         if (ret < 0)
+         {
+             WARN("couldn't make socket non-blocking, error %d\n", ret);
+@@ -928,7 +921,6 @@
+   int ret;
+   struct sockaddr_in address;
+   socklen_t addrsize;
+-  u_long blocking;
+   RpcConnection_tcp *server = (RpcConnection_tcp*) old_conn;
+   RpcConnection_tcp *client = (RpcConnection_tcp*) new_conn;
+ 
+@@ -940,8 +932,7 @@
+     return RPC_S_OUT_OF_RESOURCES;
+   }
+   /* reset to blocking behaviour */
+-  blocking = 0;
+-  ret = ioctlsocket(ret, FIONBIO, &blocking);
++  fcntl(ret, F_SETFL, 0);
+   client->sock = ret;
+   TRACE("Accepted a new TCP connection\n");
+   return RPC_S_OK;
+@@ -1125,12 +1116,10 @@
+     if (ps)
+     {
+         int fds[2];
+-        u_long blocking;
+         if (!socketpair(PF_UNIX, SOCK_DGRAM, 0, fds))
+         {
+-            blocking = 1;
+-            ioctlsocket(fds[0], FIONBIO, &blocking);
+-            ioctlsocket(fds[1], FIONBIO, &blocking);
++            fcntl(fds[0], F_SETFL, O_NONBLOCK);
++            fcntl(fds[1], F_SETFL, O_NONBLOCK);
+             ps->mgr_event_rcv = fds[0];
+             ps->mgr_event_snd = fds[1];
+         }
+@@ -1211,7 +1200,7 @@
+     
+     if (!poll_info)
+         return -1;
+-
++    
+     ret = poll(poll_info, count, -1);
+     if (ret < 0)
+     {