diff --git a/win/winvnc/winvnc.cxx b/win/winvnc/winvnc.cxx
index 17b3a91..c2abd89 100644
--- a/win/winvnc/winvnc.cxx
+++ b/win/winvnc/winvnc.cxx
@@ -182,7 +182,7 @@
         close_console = true;
         vlog.info("closing console");
         if (!FreeConsole())
-          vlog.info("unable to close console:%u", GetLastError());
+          vlog.info("unable to close console:%lu", GetLastError());
 
       } else if ((strcasecmp(argv[i], "-help") == 0) ||
         (strcasecmp(argv[i], "--help") == 0) ||