diff --git a/ChangeLog b/ChangeLog
index 3d610857529a41d2f9c2064daaaf6c932d23c085..251025742423f589dc280580b14b1bf8e85ed96f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -167,6 +167,9 @@ Changes in version 0.2.1.20 - 2009-??-??
       0.2.1.6-alpha.
     - Teach connection_ap_can_use_exit to respect the Exclude*Nodes config
       options. Should fix bug 1090. Bugfix on 0.0.2-pre16.
+    - Avoid segfault in rare cases when finishing an introduction circuit
+      as a client and finding out that we don't have an introduction key
+      for it. Fixes bug 1073. Reported by Aaron Swartz.
 
   o Minor features:
     - Add a "getinfo status/accepted-server-descriptor" controller