diff --git a/Koha/REST/V1/Checkouts.pm b/Koha/REST/V1/Checkouts.pm
index c1b874f35d..301369a45c 100644
--- a/Koha/REST/V1/Checkouts.pm
+++ b/Koha/REST/V1/Checkouts.pm
@@ -120,7 +120,7 @@ sub _check_availability {
 
         # Upgrade some confirmations to blockers
         my @should_block =
-          qw/TOO_MANY ISSUED_TO_ANOTHER RESERVED RESERVED_WAITING TRANSFERRED PROCESSING AGE_RESTRICTION/;
+          qw/TOO_MANY ISSUED_TO_ANOTHER RESERVED RESERVE_WAITING TRANSFERRED PROCESSING AGE_RESTRICTION/;
         for my $block (@should_block) {
             if ( exists( $confirmation->{$block} ) ) {
                 $impossible->{$block} = $confirmation->{$block};
diff --git a/koha-tmpl/opac-tmpl/bootstrap/js/modals/checkout.js b/koha-tmpl/opac-tmpl/bootstrap/js/modals/checkout.js
index 9495d02ee4..9c9ece5c0f 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/js/modals/checkout.js
+++ b/koha-tmpl/opac-tmpl/bootstrap/js/modals/checkout.js
@@ -25,7 +25,7 @@ $(document).ready(function() {
             result += _("Your account is currently in debt by '%s'").format(data);
         } else if (code == 'ISSUED_TO_ANOTHER') {
             result += _("This item appears to be checked out to another patron, please return it to the desk");
-        } else if (code == 'RESERVED' || code == 'RESERVED_WAITING') {
+        } else if (code == 'RESERVED' || code == 'RESERVE_WAITING') {
             result += _("This item appears to be on hold for another patron, please return it to the desk");
         } else if (code == 'TOO_MANY') {
             result += _("You have reached the maximum number of checkouts allowed on your account");