diff --git a/init.el b/init.el
index 74993fe..9e6f79f 100644
--- a/init.el
+++ b/init.el
@@ -649,6 +649,37 @@
   (:option inferior-lisp-program acdw/lisp-bin)
 
   (setup (:straight clhs))
+
+  (defmacro acdw/cl-define-key (key-string &rest bindings)
+    "Define KEY-STRING to functions in BINDINGS.
+KEY-STRING is passed directly to `kbd'.  BINDINGS are a lists of
+the form (:IDE MAP FUNC AFTER), where IDE is an IDE (like `slime' or
+`sly'), MAP is the mapping in which to bind KEY-STRING, FUNC
+is the function to bind KEY-STRING to in that IDE and MAP, and AFTER is the file to `eval-after-load' the `define-key' definition.
+`acdw/cl-define-key' only binds the keys that match `acdw/cl-ide'
+to save computation time."
+    (declare (indent 1))
+    (let* ((binding (catch :found
+                      (dolist (b bindings)
+                        (when (eq (car b) acdw/cl-ide)
+                          (throw :found b)))))
+           (binding-map `,(nth 1 binding))
+           (binding-func `(function ,(nth 2 binding)))
+           (binding-after `,(nth 3 binding)))
+      `(with-eval-after-load ',binding-after
+         (define-key ,binding-map (kbd ,key-string) ,binding-func))))
+
+  (dolist (key '("RET" "<return>"))
+    (acdw/cl-define-key key
+      (:slime slime-repl-mode-map slime-repl-return-at-end slime)
+      (:sly sly-mrepl-mode-map sly-mrepl-return-at-end sly-mrepl)))
+
+  (eval-after-load 'sly-mrepl
+    (function
+     (lambda nil
+       (define-key sly-mrepl-mode-map
+         (kbd "C-c C-c")
+         (function sly-mrepl-return)))))
   
   (pcase acdw/cl-ide
     (:slime
@@ -661,10 +692,6 @@
                                      "~/var/quicklisp/slime-helper.el"))))
          (load slime-helper))
 
-       (with-eval-after-load 'slime
-         (dolist (key (list (kbd "RET")
-                            (kbd "<return>")))
-           (define-key slime-repl-mode-map key #'slime-repl-return-at-end)))
        (defun slime-repl-return-at-end ()
          (interactive)
          (if (<= (point-max) (point))
@@ -680,11 +707,6 @@
     (:sly
      (setup (:straight sly)
        (:option sly-kill-without-query-p t)
-
-       (with-eval-after-load 'sly-mrepl
-         (dolist (key (list (kbd "RET")
-                            (kbd "<return>")))
-           (define-key sly-mrepl-mode-map key #'sly-mrepl-return-at-end)))
        
        (defun sly-mrepl-return-at-end ()
          (interactive)