diff --git a/ietf/templates/submit/upload_submission.html b/ietf/templates/submit/upload_submission.html
index 2fd9df638..deec285b2 100644
--- a/ietf/templates/submit/upload_submission.html
+++ b/ietf/templates/submit/upload_submission.html
@@ -49,7 +49,7 @@
             processor <b>must</b> be provided.
             <br/>
             For v3 .xml sources which include external files, this requires them to be run through xml2rfc with
-            the <tt>--prep</tt> option, to produce a completely expanded (standalone) .xml source file for
+            the <tt>--expand</tt> option, to produce a completely expanded (standalone) .xml source file for
             upload.
             <br/>
             If no .txt file is provided, one will be generated from the .xml file.