diff --git a/client/sleep.h b/client/sleep.h
new file mode 100644
index 00000000..1ff4e677
--- /dev/null
+++ b/client/sleep.h
@@ -0,0 +1,14 @@
+#ifndef SLEEP_H__
+#define SLEEP_H__
+
+#ifdef WIN32
+#include <windows.h>
+#define sleep(n) Sleep(1000 * n)
+#define msleep(n) Sleep(n)
+#else
+#include <unistd.h>
+#define msleep(n) usleep(1000 * n)
+#endif
+
+#endif
+