--- a/README.md	Tue Mar 15 17:25:18 2016 +0000
+++ b/README.md	Thu Mar 17 09:12:18 2016 -0700
@@ -13,3 +13,8 @@
 
     [extensions]
     topics=path/to/hg-topics/src
+
+If you are using Mercurial 3.7 use:
+
+    [extensions]
+    hgext3rd.topics=path/to/hg-topics/src