diff --git a/services.proto b/services.proto
index b8a7f3c..75c605f 100644
--- a/services.proto
+++ b/services.proto
@@ -11,6 +11,7 @@ import "common.proto";
 import "indexing.proto";
 import "serving.proto";
 import "status.proto";
+import "list_documents.proto";
 import "google/api/annotations.proto";
 
 option java_package = "com.vectara";