diff --git a/lisp/gnus/mm-uu.el b/lisp/gnus/mm-uu.el
index 18322ecb4d1..3455cc423d9 100644
--- a/lisp/gnus/mm-uu.el
+++ b/lisp/gnus/mm-uu.el
@@ -711,6 +711,8 @@ Assume text has been decoded if DECODED is non-nil."
 		    ;; Mutt still uses application/pgp even though
 		    ;; it has already been withdrawn.
 		    (string-match "\\`text/\\|\\`application/pgp\\'" type)
+		    (not
+		     (string-match "\\`text/x-\\(?:diff\\|patch\\)\\'" type))
                     (equal (car (mm-handle-disposition handle))
                            "inline")
 		    (setq