diff --git a/lisp/keymap.el b/lisp/keymap.el
index ad7d4fbbba1..376a30f1065 100644
--- a/lisp/keymap.el
+++ b/lisp/keymap.el
@@ -313,7 +313,7 @@ Modifiers have to be specified in this order:
 which is
 
    Alt-Control-Hyper-Meta-Shift-super"
-  (declare (pure t) (side-effect-free t))
+  (declare (pure t) (side-effect-free error-free))
   (let ((case-fold-search nil))
     (and
      (stringp keys)
diff --git a/lisp/subr.el b/lisp/subr.el
index 1a16d781174..ff82d0d1d8d 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -6820,7 +6820,7 @@ This means that OBJECT can be printed out and then read back
 again by the Lisp reader.  This function returns nil if OBJECT is
 unreadable, and the printed representation (from `prin1') of
 OBJECT if it is readable."
-  (declare (side-effect-free t))
+  (declare (side-effect-free error-free))
   (catch 'unreadable
     (let ((print-unreadable-function
            (lambda (_object _escape)