Index: ext/lsm1/lsm-test/lsmtest.h
==================================================================
--- ext/lsm1/lsm-test/lsmtest.h
+++ ext/lsm1/lsm-test/lsmtest.h
@@ -18,11 +18,11 @@
 #ifdef _WIN32
 # include "windows.h"
 # define gettimeofday win32GetTimeOfDay
 # define F_OK  (0)
 # define sleep(sec) Sleep(1000 * (sec))
-# define usleep(usec) Sleep((usec) / 1000)
+# define usleep(usec) Sleep(((usec) + 999) / 1000)
 # ifdef _MSC_VER
 #  include <io.h>
 #  define snprintf _snprintf
 #  define fsync(fd) FlushFileBuffers((HANDLE)_get_osfhandle((fd)))
 #  define fdatasync(fd) FlushFileBuffers((HANDLE)_get_osfhandle((fd)))