diff --git a/doc/spec/proposals/152-single-hop-circuits.txt b/doc/spec/proposals/152-single-hop-circuits.txt
index 7f3894c65a..e49a4250e0 100644
--- a/doc/spec/proposals/152-single-hop-circuits.txt
+++ b/doc/spec/proposals/152-single-hop-circuits.txt
@@ -5,6 +5,7 @@ Last-Modified:
 Author: Geoff Goodell
 Created: 13-Jul-2008
 Status: Closed
+Implemented-In: 0.2.1.6-alpha
 
 Overview