diff --git a/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg b/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg
index 5d6c50a2b6..15cddcb474 100755
--- a/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg
+++ b/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg
@@ -369,7 +369,8 @@ if not os.getenv('BUILDBOT_DEVELOPMENT_MODE'):
       fromaddr='webrtc-cb-watchlist@google.com',
       extraRecipients=['webrtc-cb-watchlist@google.com'],
       sendToInterestedUsers=True,
-      mode='failing')
+      mode='failing',
+      lookup=master_utils.UsersAreEmails())
   c['status'] += [email_status]
 
 ####### DB URL