diff --git a/debbugs-gnu.el b/debbugs-gnu.el
index b5f07ad3cd..85c891a483 100644
--- a/debbugs-gnu.el
+++ b/debbugs-gnu.el
@@ -1897,6 +1897,11 @@ MERGED is the list of bugs merged with this one."
   :version "29.1"
   :type 'regexp)

+(defcustom debbugs-gnu-summary-keep-posting-styles nil
+  "Whether to keep the user's `gnus-posting-styles'."
+  :version "30.1"
+  :type 'boolean)
+
 (defvar debbugs-gnu-summary-mode-map
   (let ((map (make-sparse-keymap)))
     (define-key map "C" #'debbugs-gnu-send-control-message)
@@ -1910,7 +1915,11 @@ MERGED is the list of bugs merged with this one."
 \\{debbugs-gnu-summary-mode-map}"
   :lighter " Debbugs" :keymap debbugs-gnu-summary-mode-map
   (set (make-local-variable 'gnus-posting-styles)
-       `((".*"
+       `(;; We apply them first, because we want to keep our own
+         ;; posting-styles prior the others.
+         ,@(and debbugs-gnu-summary-keep-posting-styles
+                (default-value 'gnus-posting-styles))
+         (".*"
 	  (eval
 	   (when (buffer-live-p gnus-article-copy)
 	     (with-current-buffer gnus-article-copy