diff --git a/src/http/ngx_http_upstream_round_robin.c b/src/http/ngx_http_upstream_round_robin.c
index be93ccb..441a1aa 100644
--- a/src/http/ngx_http_upstream_round_robin.c
+++ b/src/http/ngx_http_upstream_round_robin.c
@@ -608,8 +608,8 @@
     rc = ngx_ssl_set_session(pc->connection, ssl_session);
 
     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
-                  "set session: %p:%d",
-                  ssl_session, ssl_session ? ssl_session->references : 0);
+                   "set session: %p:%d",
+                   ssl_session, ssl_session ? ssl_session->references : 0);
 
     /* ngx_unlock_mutex(rrp->peers->mutex); */
 
@@ -633,7 +633,7 @@
     }
 
     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
-                  "save session: %p:%d", ssl_session, ssl_session->references);
+                   "save session: %p:%d", ssl_session, ssl_session->references);
 
     peer = &rrp->peers->peer[rrp->current];
 
@@ -648,7 +648,7 @@
     if (old_ssl_session) {
 
         ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
-                      "old session: %p:%d",
+                       "old session: %p:%d",
                        old_ssl_session, old_ssl_session->references);
 
         /* TODO: may block */