diff --git a/lisp/erc/erc-backend.el b/lisp/erc/erc-backend.el
index 140755fab51..a26cb740a73 100644
--- a/lisp/erc/erc-backend.el
+++ b/lisp/erc/erc-backend.el
@@ -1169,7 +1169,8 @@ Would expand to:
 \(fn (NAME &rest ALIASES) &optional EXTRA-FN-DOC EXTRA-VAR-DOC &rest FN-BODY)"
   (declare (debug (&define [&name "erc-response-handler@"
                                   (symbolp &rest symbolp)]
-                           &optional sexp sexp def-body)))
+                           &optional sexp sexp def-body))
+           (indent defun))
   (if (numberp name) (setq name (intern (format "%03i" name))))
   (setq aliases (mapcar (lambda (a)
                           (if (numberp a)