diff --git a/common/md5.h b/common/md5.h
index 0fb0a4a..b0daab1 100644
--- a/common/md5.h
+++ b/common/md5.h
@@ -88,7 +88,11 @@ struct md5_ctx
 
   md5_uint32 total[2];
   md5_uint32 buflen;
-  char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
+  char buffer[128]
+#if __GNUC__
+   __attribute__ ((__aligned__ (__alignof__ (md5_uint32))))
+#endif
+  ;
 };
 
 /*
diff --git a/libvncserver/httpd.c b/libvncserver/httpd.c
index 8634b15..26d49af 100644
--- a/libvncserver/httpd.c
+++ b/libvncserver/httpd.c
@@ -47,6 +47,7 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #define close closesocket
+#define strcasecmp _stricmp 
 #if defined(_MSC_VER)
 #include <BaseTsd.h> /* For the missing ssize_t */
 #define ssize_t SSIZE_T
diff --git a/libvncserver/rfbcrypto.h b/libvncserver/rfbcrypto.h
index 9dc3e63..7853154 100644
--- a/libvncserver/rfbcrypto.h
+++ b/libvncserver/rfbcrypto.h
@@ -1,6 +1,7 @@
 #ifndef _RFB_CRYPTO_H
 #define _RFB_CRYPTO_H 1
 
+#ifdef LIBVNCSERVER_HAVE_UIO_H
 #include <sys/uio.h>
 
 #define SHA1_HASH_SIZE 20
@@ -8,5 +9,6 @@
 
 void digestmd5(const struct iovec *iov, int iovcnt, void *dest);
 void digestsha1(const struct iovec *iov, int iovcnt, void *dest);
+#endif
 
 #endif
diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
index bc9cc11..040238d 100644
--- a/libvncserver/rfbserver.c
+++ b/libvncserver/rfbserver.c
@@ -37,6 +37,7 @@
 #include <rfb/rfb.h>
 #include <rfb/rfbregion.h>
 #include "private.h"
+#include "rfb/rfbconfig.h"
 
 #ifdef LIBVNCSERVER_HAVE_FCNTL_H
 #include <fcntl.h>
@@ -74,7 +75,9 @@
 /* stst() */
 #include <sys/types.h>
 #include <sys/stat.h>
+#if LIBVNCSERVER_HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 
 #ifndef WIN32
 /* readdir() */
diff --git a/libvncserver/tightvnc-filetransfer/filetransfermsg.c b/libvncserver/tightvnc-filetransfer/filetransfermsg.c
index 153f123..5f84e7f 100644
--- a/libvncserver/tightvnc-filetransfer/filetransfermsg.c
+++ b/libvncserver/tightvnc-filetransfer/filetransfermsg.c
@@ -56,7 +56,9 @@
 #endif
 
 #include <errno.h>
+#if LIBVNCSERVER_HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <sys/stat.h>
 #include <sys/types.h>
 
diff --git a/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c b/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c
index b235fa0..c511eed 100644
--- a/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c
+++ b/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c
@@ -29,7 +29,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#if LIBVNCSERVER_HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #ifndef _MSC_VER
 #include <dirent.h>
 #include <pthread.h>
diff --git a/libvncserver/websockets.c b/libvncserver/websockets.c
index f596ab1..72396c2 100644
--- a/libvncserver/websockets.c
+++ b/libvncserver/websockets.c
@@ -49,7 +49,9 @@
 #endif
 
 #include <string.h>
+#if LIBVNCSERVER_UNISTD_H
 #include <unistd.h>
+#endif
 #include "rfb/rfbconfig.h"
 #include "rfbssl.h"
 #include "rfbcrypto.h"
@@ -116,15 +118,27 @@ typedef union ws_mask_s {
  *      it from recognizing anonymous structs and unions.
  *      See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=4784
  */
-typedef struct __attribute__ ((__packed__)) ws_header_s {
+typedef struct 
+#if __GNUC__
+__attribute__ ((__packed__)) 
+#endif
+ws_header_s {
   unsigned char b0;
   unsigned char b1;
   union {
-    struct __attribute__ ((__packed__)) {
+    struct 
+#if __GNUC__
+    __attribute__ ((__packed__)) 
+#endif
+           {
       uint16_t l16;
       ws_mask_t m16;
     } s16;
-    struct __attribute__ ((__packed__)) {
+    struct
+#if __GNUC__
+__attribute__ ((__packed__)) 
+#endif
+           {
       uint64_t l64;
       ws_mask_t m64;
     } s64;
diff --git a/rfb/rfb.h b/rfb/rfb.h
index c6edc11..f982b40 100644
--- a/rfb/rfb.h
+++ b/rfb/rfb.h
@@ -54,6 +54,7 @@ extern "C"
 
 #ifdef WIN32
 #undef SOCKET
+typedef UINT32 in_addr_t;
 #include <winsock2.h>
 #ifdef LIBVNCSERVER_HAVE_WS2TCPIP_H
 #undef socklen_t