diff --git a/lisp/gnus/mm-uu.el b/lisp/gnus/mm-uu.el
index 3c7e3cbdf1a..26b2c03a3dc 100644
--- a/lisp/gnus/mm-uu.el
+++ b/lisp/gnus/mm-uu.el
@@ -173,7 +173,7 @@ This can be either \"inline\" or \"attachment\".")
      ,#'mm-uu-diff-test)
     (git-format-patch
      "^diff --git "
-     "^-- "
+     "^$"
      ,#'mm-uu-diff-extract
      nil
      ,#'mm-uu-diff-test)