diff --git a/contrib/win32/unistd.h b/contrib/win32/unistd.h
new file mode 100644
index 0000000..52250f8
--- /dev/null
+++ b/contrib/win32/unistd.h
@@ -0,0 +1,33 @@
+/*-
+ * Public platform independent Near Field Communication (NFC) library
+ * 
+ * Copyright (C) 2011, Romuald Conty
+ * 
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * @file unistd.h
+ * @brief This file intended to serve as a drop-in replacement for unistd.h on Windows
+ */
+
+#ifndef _UNISTD_H_
+#define _UNISTD_H_
+
+// Needed by Sleep() under Windows
+#  include <winbase.h>
+#  define sleep(X) Sleep( X * 1000)
+
+#endif /* _UNISTD_H_ */
+
diff --git a/examples/nfc-relay-picc.c b/examples/nfc-relay-picc.c
index b351ca8..b72b940 100644
--- a/examples/nfc-relay-picc.c
+++ b/examples/nfc-relay-picc.c
@@ -48,23 +48,12 @@
 #include <string.h>
 #include <signal.h>
 
+#include <unistd.h>
+
 #include <nfc/nfc.h>
 
 #include "nfc-utils.h"
 
-// TODO Move this Windows conditional code in contrib/win32/ or contrib/windows.h
-#ifndef _WIN32
-// Needed by sleep() under Unix
-#  include <unistd.h>
-#  define sleep sleep
-#  define SUSP_TIME 1           // secs.
-#else
-// Needed by Sleep() under Windows
-#  include <winbase.h>
-#  define sleep Sleep
-#  define SUSP_TIME 1000        // msecs.
-#endif
-
 #define MAX_FRAME_LEN 264
 #define MAX_DEVICE_COUNT 2
 
@@ -432,7 +421,7 @@ main (int argc, char *argv[])
         if (!quiet_output) {
           printf ("Waiting %is to simulate longer relay...\n", waiting_time);
         }
-        sleep(waiting_time * SUSP_TIME);
+        sleep(waiting_time);
       }
       // Show transmitted response
       if (!quiet_output) {