diff --git a/AUTHORS b/AUTHORS
index 5fa5205cf..15bd1771a 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -134,6 +134,7 @@ The following submitted code, packages or analysis, and deserve special thanks:
   Vladimir
   Zachary Manning
   jrabbit
+  Jelle van der Waa
 
 Thanks to the following, who submitted detailed bug reports and excellent
 suggestions:
diff --git a/ChangeLog b/ChangeLog
index 015e45434..3aa06ec3d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -49,6 +49,8 @@
   "yes", "y", "no", "n".
 - Fixed test harness for Python 3.x.
           (thanks to jrabbit).
+- Improved certificate validation diagnostics
+          (thanks to Jelle van der Waa).
 
 2.5.1 (2016-02-24) 8b4ae3b54b44dfbd00b96cdd6dceb8dfe7cc1ea0