diff --git a/changes.proto b/changes.proto
index 0354f77..a7f8b03 100644
--- a/changes.proto
+++ b/changes.proto
@@ -577,6 +577,9 @@ message ChangeSummary {
 
   // Repo information; can be an empty string. CLI attempts auto-population, but users can override. Not necessarily a URL. The UI will be responsible for any formatting/shortnening/sprucing up should it be required.
   string repo = 16;
+
+  // User-defined tags associated with this change, will be populated via the CLI and not the UI.
+  map<string, string> tags = 17;
 }
 
 // a complete Change with machine-supplied and user-supplied values