diff --git a/changes.proto b/changes.proto
index 596ebf0..4b05293 100644
--- a/changes.proto
+++ b/changes.proto
@@ -166,7 +166,14 @@ message GetDiffRequest {
 }
 
 message GetDiffResponse {
-  repeated ItemDiff items = 1;
+  // Changes to items that were used to calculate the blast radius, i.e. items
+  // we expected to change
+  repeated ItemDiff expectedItems = 1;
+  
+  // Items that changed within the blast radius, but that weren't used to
+  // calculate it i.e. unexpected changes
+  repeated ItemDiff unexpectedItems = 3;
+  
   repeated Edge edges = 2;
 }