diff --git a/perf/remote_thr.cpp b/perf/remote_thr.cpp
index 2f98bd4e..c2ce375e 100644
--- a/perf/remote_thr.cpp
+++ b/perf/remote_thr.cpp
@@ -28,7 +28,15 @@
 #include <time.h>
 #include <limits.h>
 #include <sys/time.h>
+
+#include "platform.hpp"
+
+#if defined ZMQ_HAVE_WINDOWS
+#include <windows.h>
+#include <process.h>
+#else
 #include <pthread.h>
+#endif
 
 #define		ZMSG 1
 #define		DATA 0
@@ -82,18 +90,22 @@ void my_free (void *data, void *hint)
     //free (data);
 }
 
-static void *worker_routine (void *ctx) {
-
+#if defined ZMQ_HAVE_WINDOWS
+static unsigned int __stdcall worker_routine (void *ctx)
+#else
+static void *worker_routine (void *ctx)
+#endif
+{
 	int rc,i;
 	void *buf = NULL;
 
-	if( !(buf = malloc( message_size))){ perror("malloc"); return NULL;}
+	if( !(buf = malloc( message_size))){ perror("malloc"); return 0;}
 
     void *s = zmq_socket (ctx, flow);
 
     if (!s) {
         printf ("error in zmq_socket: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 
     //  Add your socket options here.
@@ -105,44 +117,44 @@ static void *worker_routine (void *ctx) {
 	rc = zmq_setsockopt (s, ZMQ_RCVBUF, &rcvbuflen, rcvbuflenlen);
     if (rc != 0) {
         printf ("error in zmq_setsockopt: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 	rc = zmq_setsockopt (s, ZMQ_SNDBUF, &sndbuflen, sndbuflenlen);
     if (rc != 0) {
         printf ("error in zmq_setsockopt: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 
 	sndbuflen = 1;
 	rc = zmq_setsockopt (s, ZMQ_DELAY_ATTACH_ON_CONNECT, &sndbuflen, sndbuflenlen);
     if (rc != 0) {
         printf ("error in zmq_setsockopt: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 
 	sndbuflen = 2;
 	rc = zmq_setsockopt (s, ZMQ_SNDHWM, &sndbuflen, sndbuflenlen);
     if (rc != 0) {
         printf ("error in zmq_setsockopt: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 
 	sndbuflen = 2;
 	rc = zmq_setsockopt (s, ZMQ_RCVHWM, &sndbuflen, sndbuflenlen);
     if (rc != 0) {
         printf ("error in zmq_setsockopt: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 
 	rc = zmq_getsockopt (s, ZMQ_RCVBUF, &rcvbuflen, &rcvbuflenlen);
     if (rc != 0) {
         printf ("error in zmq_getsockopt: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 	rc = zmq_getsockopt (s, ZMQ_SNDBUF, &sndbuflen, &sndbuflenlen);
     if (rc != 0) {
         printf ("error in zmq_getsockopt: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 
 	printf("RCVBUF=%d KB SNDBUF=%d KB adjusted\n", rcvbuflen/1024, sndbuflen/1024);
@@ -151,7 +163,7 @@ static void *worker_routine (void *ctx) {
     rc = zmq_connect (s, connect_to);
     if (rc != 0) {
         printf ("error in zmq_connect: %s\n", zmq_strerror (errno));
-        return NULL;
+        return 0;
     }
 
 	printf("%sING %s...\n", flow == ZMQ_PUSH ? "PUSH":"PULL", rec ? "ZMQ_MSG":"DATA");
@@ -167,13 +179,13 @@ static void *worker_routine (void *ctx) {
             rc = zmq_msg_init_data (&msg, buf, message_size, NULL, NULL);
             if (rc != 0) {
                 printf ("error in zmq_msg_init_data: %s\n", zmq_strerror (errno));
-                return NULL;
+                return 0;
             }
 
             rc = zmq_msg_send( &msg, s, 0);
             if (rc < 0) {
                 printf ("error in zmq_send: %s\n", zmq_strerror (errno));
-            return NULL;
+                return 0;
             }
 
             rc = zmq_msg_close (&msg);
@@ -189,7 +201,7 @@ static void *worker_routine (void *ctx) {
             rc = zmq_send( s, buf, message_size, 0);
             if (rc < 0) {
                 printf ("error in zmq_send: %s\n", zmq_strerror (errno));
-            	return NULL;
+                return 0;
             }
         }}
 
@@ -203,13 +215,13 @@ static void *worker_routine (void *ctx) {
         rc = zmq_msg_init (&msg);
         if (rc != 0) {
             printf ("error in zmq_msg_init: %s\n", zmq_strerror (errno));
-            return NULL;
+            return 0;
         }
         for (i = 0; i != message_count; i++) {
             rc = zmq_msg_recv (&msg, s, 0);
             if (rc < 0) {
                 printf ("error in zmq_recv: %s\n", zmq_strerror (errno));
-                return NULL;
+                return 0;
             }
         }}
 
@@ -219,7 +231,7 @@ static void *worker_routine (void *ctx) {
             rc = zmq_recv( s, buf, message_size, 0);
             if (rc < 0) {
                 printf ("error in zmq_recv: %s\n", zmq_strerror (errno));
-                return NULL;
+                return 0;
             }
         }}
     }
@@ -227,12 +239,12 @@ static void *worker_routine (void *ctx) {
     rc = zmq_close (s);
     if (rc != 0) {
         printf ("error in zmq_close: %s\n", zmq_strerror (errno));
-		return NULL;
+        return 0;
     }
 
 	free( buf);
 
-    return NULL;
+    return 0;
 }
 
 int main (int argc, char *argv [])
@@ -240,7 +252,6 @@ int main (int argc, char *argv [])
     void *ctx;
     int rc;
     int i;
-	void *p;
 
     if (argc != 10) {
         printf ("usage: remote_thr <connect-to> <message-size> <message-count> <SND buffer> <RCV buffer> <flow (PUSH/PULL)> <records (ZMSG/DATA)> <zmq-threads> <workers>\n");
@@ -280,21 +291,34 @@ int main (int argc, char *argv [])
         return -1;
     }
 
-	printf("Threads: %d, workers %d\n", zmq_ctx_get( ctx, ZMQ_IO_THREADS), workers);
-	pthread_t worker[128];
+    printf("Threads: %d, workers %d\n", zmq_ctx_get( ctx, ZMQ_IO_THREADS), workers);
+#if defined ZMQ_HAVE_WINDOWS
+    HANDLE worker[128];
+#else
+    pthread_t worker[128];
+#endif
 
     US_TIMER timer;
 
     tm_init( &timer);
 
     for (i = 0; i < workers; i++) {
+#if defined ZMQ_HAVE_WINDOWS
+        worker[i] = (HANDLE) _beginthreadex (NULL, 0, worker_routine, ctx, 0 , NULL);
+#else
         pthread_create (&worker[i], NULL, worker_routine, ctx);
-		printf("Worker %d spawned\n", i);
+#endif
+        printf("Worker %d spawned\n", i);
     }
 
     for (i = 0; i < workers; i++) {
+#if defined ZMQ_HAVE_WINDOWS
+        WaitForSingleObject (worker[i], INFINITE);
+        CloseHandle (worker[i]);
+#else
         pthread_join( worker[i], &p);
-		printf("Worker %d joined\n", i);
+#endif
+        printf("Worker %d joined\n", i);
     }
 
     float secs = tm_secs( &timer);