diff --git a/mbox2web b/mbox2web
index c100bed..e95fabf 100755
--- a/mbox2web
+++ b/mbox2web
@@ -254,7 +254,7 @@ def render_body(msg, extra=None):
         partstypes = []
         for part in msg.get_payload():
             partstypes.append(part.get_content_type())
-            partshtml.append(render_body(part))
+            partshtml.append(render_body(part, extra))
         bodytmpl = jenv.get_template("body_multipart_alternative.html")
         context = {
             "types": partstypes,