diff --git a/C4/Acquisition.pm b/C4/Acquisition.pm
index 747450293f..2a3f9c4c72 100644
--- a/C4/Acquisition.pm
+++ b/C4/Acquisition.pm
@@ -961,6 +961,10 @@ sub ModOrder {
 
     my $dbh = C4::Context->dbh;
     my @params;
+
+    # update uncertainprice to an integer, just in case (under FF, checked boxes have the value "ON" by default)
+    $orderinfo->{uncertainprice}=1 if $orderinfo->{uncertainprice};
+
 #    delete($orderinfo->{'branchcode'});
     # the hash contains a lot of entries not in aqorders, so get the columns ...
     my $sth = $dbh->prepare("SELECT * FROM aqorders LIMIT 1;");
diff --git a/acqui/addorder.pl b/acqui/addorder.pl
index 35d350764d..44623ec66e 100755
--- a/acqui/addorder.pl
+++ b/acqui/addorder.pl
@@ -152,6 +152,7 @@ my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
 # get CGI parameters
 my $orderinfo					= $input->Vars;
 $orderinfo->{'list_price'}    ||=  0;
+$orderinfo->{'uncertainprice'} ||= 0;
 #my $ordernumber        = $input->param('ordernumber');
 #my $basketno      = $input->param('basketno');
 #my $booksellerid  = $input->param('booksellerid');