diff --git a/lisp/window.el b/lisp/window.el
index 424f1319ab7..d91bbabc010 100644
--- a/lisp/window.el
+++ b/lisp/window.el
@@ -8795,7 +8795,8 @@ another window."
   :group 'windows
   :group 'comint)
 
-(defcustom display-tex-shell-buffer-action '(display-buffer-in-previous-window)
+(defcustom display-tex-shell-buffer-action '(display-buffer-in-previous-window
+                                             (inhibit-same-window . t))
   "`display-buffer' action for displaying TeX shell buffers."
   :type display-buffer--action-custom-type
   :risky t