diff --git a/README.md b/README.md
index 59afd57..cd51b04 100644
--- a/README.md
+++ b/README.md
@@ -44,12 +44,16 @@ always be `1`.
 
 - You can delete the selected window by calling `ace-window` with a double prefix argument, i.e. <kbd>C-u C-u</kbd>.
 
+- You may replace the target window with the current one while closing current one by calling `ace-window` with a negative prefix argument, i.e. <kbd>C--</kbd>
+
 ## Change the action midway
 
 You can also start by calling `ace-window` and then decide to switch the action to `delete` or `swap` etc.  By default the bindings are:
 
 - <kbd>x</kbd> - delete window
-- <kbd>m</kbd> - swap (move) window
+- <kbd>m</kbd> - swap window
+- <kbd>M</kbd> - move window
+- <kbd>r</kbd> - replace window
 - <kbd>v</kbd> - split window vertically
 - <kbd>b</kbd> - split window horizontally
 - <kbd>n</kbd> - select the previous window
diff --git a/ace-window.el b/ace-window.el
index e5bbd33..e5173cc 100644
--- a/ace-window.el
+++ b/ace-window.el
@@ -257,6 +257,7 @@ LEAF is (PT . WND)."
   '((?x aw-delete-window " Ace - Delete Window")
     (?m aw-swap-window " Ace - Swap Window")
     (?M aw-move-window " Ace - Move Window")
+    (?r aw-replace-window " Ace - Replace Window")
     (?n aw-flip-window)
     (?v aw-split-window-vert " Ace - Split Vert Window")
     (?b aw-split-window-horz " Ace - Split Horz Window")
@@ -352,6 +353,13 @@ Amend MODE-LINE to the mode line for the duration of the selection."
   (aw-select " Ace - Swap Window"
              #'aw-swap-window))
 
+;;;###autoload
+(defun ace-replace-window ()
+  "Ace replace window."
+  (interactive)
+  (aw-select " Ace - Replace Window"
+             #'aw-replace-window))
+
 ;;;###autoload
 (defun ace-maximize-window ()
   "Ace maximize window."
@@ -372,9 +380,14 @@ buffer moves to current window (and current buffer moves to
 selected window).
 
 Prefixed with two \\[universal-argument]'s, deletes the selected
-window."
+window.
+
+Prefixed with a negative \\[universal-argument], replaces
+selected window's buffer with current window's buffer, while
+closing current window."
   (interactive "p")
   (cl-case arg
+    (-1 (ace-replace-window))
     (0
      (setq aw-ignore-on
            (not aw-ignore-on))
@@ -489,6 +502,14 @@ Switch the current window to the previous buffer."
     (aw-switch-to-window window)
     (switch-to-buffer buffer)))
 
+(defun aw-replace-window (window)
+  "Move the current buffer to WINDOW.
+Delete current window."
+  (let ((buffer (current-buffer)))
+    (delete-window)
+    (aw-switch-to-window window)
+    (switch-to-buffer buffer)))
+
 (defun aw-split-window-vert (window)
   "Split WINDOW vertically."
   (select-window window)