diff --git a/runtime/observatory/observatory_sources.gypi b/runtime/observatory/observatory_sources.gypi
index fdb76fc26e8..fe89855486e 100644
--- a/runtime/observatory/observatory_sources.gypi
+++ b/runtime/observatory/observatory_sources.gypi
@@ -197,8 +197,10 @@
     'lib/src/models/objects/target.dart',
     'lib/src/models/objects/timeline_event.dart',
     'lib/src/models/objects/vm.dart',
+    'lib/src/models/repositories/class.dart',
     'lib/src/models/repositories/event.dart',
     'lib/src/models/repositories/flag.dart',
+    'lib/src/models/repositories/instance.dart',
     'lib/src/models/repositories/notification.dart',
     'lib/src/models/repositories/script.dart',
     'lib/src/models/repositories/target.dart',