diff --git a/lisp/minibuffer.el b/lisp/minibuffer.el
index 0262424b87..4cc050ff86 100644
--- a/lisp/minibuffer.el
+++ b/lisp/minibuffer.el
@@ -2290,6 +2290,8 @@ minibuffer-completion-help
   (let* ((start (or start (minibuffer--completion-prompt-end)))
          (end (or end (point-max)))
          (string (buffer-substring start end))
+         (base-prefix (buffer-substring (minibuffer--completion-prompt-end) start))
+         (base-suffix (buffer-substring end (point-max)))
          (md (completion--field-metadata start))
          (completions (completion-all-completions
                        string
@@ -2405,11 +2407,16 @@ minibuffer-completion-help
                                    ;; completion-all-completions does not give us the
                                    ;; necessary information.
                                    end))
+                        (setq-local completion-base-affixes (list base-prefix base-suffix))
                         (setq-local completion-list-insert-choice-function
                              (let ((ctable minibuffer-completion-table)
                                    (cpred minibuffer-completion-predicate)
                                    (cprops completion-extra-properties))
                                (lambda (start end choice)
+                                 (if (and (stringp start) (stringp end))
+                                     (progn
+                                       (delete-region (minibuffer-prompt-end) (point-max))
+                                       (insert start choice end))
                                  (unless (or (zerop (length prefix))
                                              (equal prefix
                                                     (buffer-substring-no-properties
@@ -2418,7 +2425,7 @@ minibuffer-completion-help
                                                      start)))
                                    (message "*Completions* out of date"))
                                  ;; FIXME: Use `md' to do quoting&terminator here.
-                                 (completion--replace start end choice)
+                                 (completion--replace start end choice))
                                  (let* ((minibuffer-completion-table ctable)
                                         (minibuffer-completion-predicate cpred)
                                         (completion-extra-properties cprops)
diff --git a/lisp/simple.el b/lisp/simple.el
index 9601e6cd76..bf9d8c8830 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -9072,6 +9072,19 @@ completion-base-position
 where the completion should be inserted and END (if non-nil) is the end
 of the text to replace.  If END is nil, point is used instead.")
 
+(defvar completion-base-affixes nil
+  "Base context of the text corresponding to the shown completions.
+This variable is used in the *Completions* buffers.
+Its value is a list of the form (PREFIX SUFFIX) where PREFIX is the text
+before the place where completion should be inserted and SUFFIX is the text
+after the completion.")
+
+(defcustom completion-use-base-affixes nil
+  "Non-nil means to restore original prefix and suffix in the minibuffer."
+  :type 'boolean
+  :version "29.1"
+  :group 'completion)
+
 (defvar completion-list-insert-choice-function #'completion--replace
   "Function to use to insert the text chosen in *Completions*.
 Called with three arguments (BEG END TEXT), it should replace the text
@@ -9164,6 +9181,7 @@ choose-completion
   (with-current-buffer (window-buffer (posn-window (event-start event)))
     (let ((buffer completion-reference-buffer)
           (base-position completion-base-position)
+          (base-affixes completion-base-affixes)
           (insert-function completion-list-insert-choice-function)
          (completion-no-auto-exit (if arg t completion-no-auto-exit))
           (choice
@@ -9184,7 +9202,8 @@ choose-completion
       (with-current-buffer buffer
         (choose-completion-string
          choice buffer
-         (or base-position
+         (or (and completion-use-base-affixes base-affixes)
+             base-position
              ;; If all else fails, just guess.
              (list (choose-completion-guess-base-position choice)))
          insert-function)))))
@@ -9357,9 +9377,11 @@ completion-setup-function
                 (buffer-substring (minibuffer-prompt-end) (point)))))))
     (with-current-buffer standard-output
       (let ((base-position completion-base-position)
+            (base-affixes completion-base-affixes)
             (insert-fun completion-list-insert-choice-function))
         (completion-list-mode)
         (setq-local completion-base-position base-position)
+        (setq-local completion-base-affixes base-affixes)
         (setq-local completion-list-insert-choice-function insert-fun))
       (setq-local completion-reference-buffer mainbuf)
       (if base-dir (setq default-directory base-dir))