diff --git a/xlog_examples_test.go b/xlog_examples_test.go
index <HASH>..<HASH> 100644
--- a/xlog_examples_test.go
+++ b/xlog_examples_test.go
@@ -1,3 +1,5 @@
+// +build go1.7
+
 package xlog_test
 
 import (
Make example compile with go <I> only