diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32ff47a04a..ed32310abd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,8 @@ BACKWARDS INCOMPATIBILITIES:
 * HTTP check output is truncated to 4k, similar to script check output. [GH-1952]
 * Consul's Go API client will now send ACL tokens using HTTP headers instead of
   query parameters, requiring Consul 0.6.0 or later. [GH-2233]
+* Removed support for protocol version 1, so Consul 0.7 is no longer compatible
+  with Consul versions prior to 0.3. [GH-2259]
 
 IMPROVEMENTS: