diff --git a/log.c b/log.c
index b266d5a9..0f42f66f 100644
--- a/log.c
+++ b/log.c
@@ -45,7 +45,7 @@ log_open(const char *path)
 	if (log_file == NULL)
 		return;
 
-	setlinebuf(log_file);
+	setvbuf(log_file, NULL, _IOLBF, 0);
 	event_set_log_callback(log_event_cb);
 
 	tzset();