diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-review.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-review.tt
index 698acf4c28..6a8e68d1b2 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-review.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-review.tt
@@ -43,7 +43,12 @@
                             [% INCLUDE 'csrf-token.inc' %]
                             <legend class="sr-only">Comments</legend>
                             <input type="hidden" name="biblionumber" value="[% biblio.biblionumber | html %]" />
-                            [% IF ( reviewid ) %]<input type="hidden" name="reviewid" value="[% reviewid | html %]" />[% END %]
+                            [% IF ( reviewid ) %]
+                                <input type="hidden" name="reviewid" value="[% reviewid | html %]" />
+                                <input type="hidden" name="op" value="cud-edit" />
+                            [% ELSE %]
+                                <input type="hidden" name="op" value="cud-add" />
+                            [% END %]
                             <fieldset>
                                 <textarea id="review" name="review" cols="60" rows="8">[% review | html %]</textarea>
                             </fieldset>
diff --git a/opac/opac-review.pl b/opac/opac-review.pl
index 12152d228e..e948e1cf16 100755
--- a/opac/opac-review.pl
+++ b/opac/opac-review.pl
@@ -32,6 +32,8 @@ my $query        = CGI->new;
 my $biblionumber = $query->param('biblionumber');
 my $review       = $query->param('review');
 my $reviewid     = $query->param('reviewid');
+my $op           = $query->param('op') // q{};
+
 my ( $template, $borrowernumber, $cookie ) = get_template_and_user(
     {
         template_name   => "opac-review.tt",
@@ -57,7 +59,7 @@ if( !$biblio ) {
     $review = $savedreview? $savedreview->review: $review;
 }
 
-if( !@errors && defined $review ) {
+if( $op =~ /^cud-/ && !@errors && defined $review ) {
 	if ($review !~ /\S/) {
 		push @errors, {empty=>1};
 	} else {