diff --git a/google/firestore/v1/firestore.proto b/google/firestore/v1/firestore.proto
index 6dc6638280..17c94ecb4e 100644
--- a/google/firestore/v1/firestore.proto
+++ b/google/firestore/v1/firestore.proto
@@ -523,6 +523,15 @@ message RunQueryResponse {
   // The number of results that have been skipped due to an offset between
   // the last response and the current response.
   int32 skipped_results = 4;
+
+  // The continuation mode for the query. If present, it indicates the current
+  // query response stream has finished. This can be set with or without a
+  // `document` present, but when set, no more results are returned.
+  oneof continuation_selector {
+    // If present, Firestore has completely finished the request and no more
+    // documents will be returned.
+    bool done = 6;
+  }
 }
 
 // The request for [Firestore.PartitionQuery][google.firestore.v1.Firestore.PartitionQuery].