diff --git a/vcstool/commands/export.py b/vcstool/commands/export.py
index 6140c206..4dd91940 100644
--- a/vcstool/commands/export.py
+++ b/vcstool/commands/export.py
@@ -46,7 +46,7 @@ def output_export_data(result, hide_empty=False):
         return
 
     try:
-        lines = []
+        lines = ["---"]
         lines.append('  %s:' % result['path'])
         lines.append('    type: ' + result['client'].__class__.type)
         export_data = result['export_data']