diff --git a/.emacs.d/lisp/init-sly.el b/.emacs.d/lisp/init-sly.el
index aa674212..043f6a12 100644
--- a/.emacs.d/lisp/init-sly.el
+++ b/.emacs.d/lisp/init-sly.el
@@ -1,5 +1,6 @@
 (require 'patch-sly)
 (require 'patch-sly-history)
+(require 'patch-sly-prompt)
 (require 'cl-lib)
 
 (defun pure-env (&rest preserve-vars)
diff --git a/.emacs.d/lisp/patch-sly-prompt.el b/.emacs.d/lisp/patch-sly-prompt.el
new file mode 100644
index 00000000..896b0345
--- /dev/null
+++ b/.emacs.d/lisp/patch-sly-prompt.el
@@ -0,0 +1,58 @@
+(defun sly-mrepl--remove-comint-highlight (start end)
+  "Some `comint' functions force the `comint-highlight-prompt'
+face, which we don't want so we remove it."
+  (font-lock--remove-face-from-text-property
+   start end
+   'font-lock-face 'comint-highlight-prompt))
+
+(defun sly-mrepl--send-input-sexp ()
+  (goto-char (point-max))
+  (save-excursion
+    (skip-chars-backward "\n\t\s")
+    (delete-region (max (point)
+                        (sly-mrepl--mark))
+                   (point-max)))
+  (buffer-disable-undo)
+  (overlay-put sly-mrepl--last-prompt-overlay 'face 'highlight)
+  (set (make-local-variable 'sly-mrepl--dirty-history) t)
+  (let ((previous-comint-last-prompt comint-last-prompt))
+    (sly-mrepl--commiting-text
+        `(field sly-mrepl-input
+                keymap ,(let ((map (make-sparse-keymap)))
+                          (define-key map (kbd "RET") 'sly-mrepl-insert-input)
+                          (define-key map [return] 'sly-mrepl-insert-input)
+                          (define-key map [mouse-2] 'sly-mrepl-insert-input)
+                          map))
+      (prog1 (comint-send-input)
+        (sly-mrepl--remove-comint-highlight
+         (car previous-comint-last-prompt)
+         (cdr previous-comint-last-prompt))))))
+
+(defun sly-mrepl--insert-prompt (package nickname error-level next-entry-idx
+                                         &optional condition)
+  (sly-mrepl--accept-process-output)
+  (overlay-put sly-mrepl--last-prompt-overlay 'face 'bold)
+  (when condition
+    (sly-mrepl--insert-note (format "Debugger entered on %s" condition)))
+  (sly-mrepl--ensure-newline)
+  (sly-mrepl--catch-up)
+  (let ((beg (marker-position (sly-mrepl--mark))))
+    (sly-mrepl--insert
+     (propertize
+      (funcall sly-mrepl-prompt-formatter
+               package
+               nickname
+               error-level
+               next-entry-idx
+               condition)
+      'sly-mrepl--prompt (downcase package)))
+      ;; `comint-output-filter' forces the `comint-highlight-prompt' face, which
+      ;; we don't want, so we remove it here.
+    (let ((prompt-start (save-excursion (forward-line 0) (point)))
+          (inhibit-read-only t))
+      (sly-mrepl--remove-comint-highlight prompt-start (point)))
+    (move-overlay sly-mrepl--last-prompt-overlay beg (sly-mrepl--mark)))
+  (buffer-disable-undo)
+  (buffer-enable-undo))
+
+(provide 'patch-sly-prompt)