diff --git a/lisp/emacs-lisp/lisp-mode.el b/lisp/emacs-lisp/lisp-mode.el
index 4576f5cd6ba..f8b935eb90b 100644
--- a/lisp/emacs-lisp/lisp-mode.el
+++ b/lisp/emacs-lisp/lisp-mode.el
@@ -235,6 +235,19 @@
                              (match-beginning 0)))))
 	  (throw 'found t))))))
 
+(defmacro let-when-compile (bindings &rest body)
+  "Like `let', but allow for compile time optimization.
+Use BINDINGS as in regular `let', but in BODY each usage should
+be wrapped in `eval-when-compile'.
+This will generate compile-time constants from BINDINGS."
+  (declare (indent 1) (debug let))
+  (cl-progv (mapcar #'car bindings)
+      (mapcar (lambda (x) (eval (cadr x))) bindings)
+    (macroexpand-all
+     (macroexp-progn
+      body)
+     macroexpand-all-environment)))
+
 (let-when-compile
     ((lisp-fdefs '("defmacro" "defun"))
      (lisp-vdefs '("defvar"))
diff --git a/lisp/subr.el b/lisp/subr.el
index ce3011d4e46..b1b363864f9 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1503,19 +1503,6 @@ All symbols are bound before the VALUEFORMs are evalled."
      ,@(mapcar (lambda (binder) `(setq ,@binder)) binders)
      ,@body))
 
-(defmacro let-when-compile (bindings &rest body)
-  "Like `let', but allow for compile time optimization.
-Use BINDINGS as in regular `let', but in BODY each usage should
-be wrapped in `eval-when-compile'.
-This will generate compile-time constants from BINDINGS."
-  (declare (indent 1) (debug let))
-  (cl-progv (mapcar #'car bindings)
-      (mapcar (lambda (x) (eval (cadr x))) bindings)
-    (macroexpand-all
-     (macroexp-progn
-      body)
-     macroexpand-all-environment)))
-
 (defmacro with-wrapper-hook (hook args &rest body)
   "Run BODY, using wrapper functions from HOOK with additional ARGS.
 HOOK is an abnormal hook.  Each hook function in HOOK \"wraps\"