diff --git a/src/spdylay_ssl.cc b/src/spdylay_ssl.cc
index 2b131a91..c27b12a0 100644
--- a/src/spdylay_ssl.cc
+++ b/src/spdylay_ssl.cc
@@ -516,7 +516,7 @@ void print_timer()
   get_timer(&tv);
   printf("%s[%3ld.%03ld]%s",
          ansi_esc("\033[33m"),
-         tv.tv_sec, tv.tv_usec/1000,
+         (long int)tv.tv_sec, tv.tv_usec/1000,
          ansi_escend());
 }