diff --git a/meerkat-common/src/main/proto/meerkat/voting.proto b/meerkat-common/src/main/proto/meerkat/voting.proto
index 8b49ca9..8ece676 100644
--- a/meerkat-common/src/main/proto/meerkat/voting.proto
+++ b/meerkat-common/src/main/proto/meerkat/voting.proto
@@ -39,6 +39,17 @@ message BallotQuestion {
 }
 
 
+message QuestionCluster {
+    UIElement cluster_description = 1;
+    repeated int32 question_index = 2;
+
+}
+
+message Channel {
+    UIElement channel_description = 1;
+    repeated int32 cluster_index = 2;
+
+}
 
 // An answer to a specific ballot question.
 // The answer is a vector of signed integers,