diff --git a/configure.ac b/configure.ac
index c8a7b06..562726a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,9 +27,6 @@ dnl Decide if this platform can support the SSH tunnel feature.
 AC_CHECK_HEADERS([sys/socket.h sys/un.h windows.h])
 AC_CHECK_FUNCS([fork socketpair])
 
-dnl Do we need to replace the usleep function (Windows).
-AC_REPLACE_FUNCS([usleep])
-
 dnl --enable-plugin to enable the browser plugin.
 NSPR_REQUIRED=4.0.0
 FIREFOX_PLUGIN_REQUIRED=1.5.0
diff --git a/src/main.c b/src/main.c
index 8986151..f12b076 100644
--- a/src/main.c
+++ b/src/main.c
@@ -51,10 +51,6 @@
 
 #include "viewer.h"
 
-#ifndef HAVE_USLEEP
-int usleep (unsigned int usecs);
-#endif
-
 // #define DEBUG 1
 #ifdef DEBUG
 #define DEBUG_LOG(s, ...) g_debug((s), ## __VA_ARGS__)
diff --git a/src/usleep.c b/src/usleep.c
deleted file mode 100644
index 95a09c5..0000000
--- a/src/usleep.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Virt Viewer: A virtual machine console viewer
- *
- * Copyright (C) 2008 Red Hat.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- * Author: Richard W.M. Jones <rjones@redhat.com>
- */
-
-/* Replacement usleep function, only used on platforms which lack
- * this system or library function.
- */
-
-#include <config.h>
-
-#ifdef HAVE_WINDOWS_H
-#include <windows.h>
-#endif
-
-#ifdef WIN32
-
-int
-usleep (unsigned int usecs)
-{
-  unsigned int msecs = usecs / 1000;
-  if (msecs < 1)
-    Sleep (1);
-  else
-    Sleep (msecs);
-}
-
-#else
-
-int
-usleep (unsigned int usecs)
-{
-  /* This sucks, but everything has sleep and it's not
-   * really that critical how long we sleep for in the
-   * main code.
-   */
-  unsigned int secs = usecs / 1000000;
-  if (secs < 1)
-    sleep (1);
-  else
-    sleep (secs);
-}
-
-#endif