diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
index 6e09eb8..4d1aa0d 100644
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -514,7 +514,7 @@
             }
         }
 
-#if (NGX_HAVE_KEEPALIVE_TUNABLE) 
+#if (NGX_HAVE_KEEPALIVE_TUNABLE)
 
         if (ls[i].keepidle) {
             if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPIDLE,