diff --git a/views/api/clockwork.jade b/views/api/clockwork.jade
index 7b523a8aa0..af2b9d21e1 100644
--- a/views/api/clockwork.jade
+++ b/views/api/clockwork.jade
@@ -24,6 +24,6 @@ block content
         input(type='hidden', name='_csrf', value=token)
         .form-group
           .input-group
-            input.form-control(type='text', name='telephone', placeholder='Phone Number')
+            input.form-control(type='text', name='telephone', placeholder='Phone Number (international format)')
             span.input-group-btn
               button.btn.btn-success(type='submit') Send