diff --git a/src/syslogd.c b/src/syslogd.c
index 9487212..0ac6e51 100644
--- a/src/syslogd.c
+++ b/src/syslogd.c
@@ -1635,7 +1635,7 @@ static void fprintlog_successive(struct filed *f, int flags)
 	buffer.timestamp = f->f_lasttime;
 	buffer.flags = flags;
 
-	snprintf(msg, sizeof(msg), "last message buffered %zd times",
+	snprintf(msg, sizeof(msg), "last message buffered %zu times",
 		 f->f_prevcount);
 	buffer.msg = msg;