diff --git a/etc/syslog-ng/conf.d/nginx.conf b/etc/syslog-ng/conf.d/nginx.conf
index f848513..e6e2392 100644
--- a/etc/syslog-ng/conf.d/nginx.conf
+++ b/etc/syslog-ng/conf.d/nginx.conf
@@ -6,10 +6,10 @@ source s_nginx_error {
 };
 
 destination d_nginx_access {
-    file("/var/log/nginx/access.log" template("${MESSAGE}\n"));
+    file("/var/log/nginx/access.log" template("${R_ISODATE} ${MESSAGE}\n"));
 };
 destination d_nginx_error {
-    file("/var/log/nginx/error.log" template("${MESSAGE}\n"));
+    file("/var/log/nginx/error.log" template("${R_ISODATE} ${MESSAGE}\n"));
 };
 
 log {