diff --git a/CHANGELOG.md b/CHANGELOG.md
index 66db53d09..9b328b1cb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## 0.6.16 (Unreleased)
 
+BACKWARDS INCOMPATIBILITIES / NOTES:
+
+ * provider/aws: `aws_eip` field `private_ip` is now a computed value, and cannot be set in your configuration. 
+    Use `associate_with_private_ip` instead. See [GH-6521]
+
 FEATURES:
 
  * **New provider:** `librato` [GH-3371]