diff --git a/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/RDBI.pm b/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/RDBI.pm
index 64ea593ca..b1ee50ea5 100644
--- a/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/RDBI.pm
+++ b/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/RDBI.pm
@@ -54,8 +54,9 @@ sub load {
     $fields = $fields ? join( ",", @$fields ) : '*';
     my $sth =
       $self->_dbh->prepare(
-        "SELECT field,value from " . $self->{dbiTable} . " WHERE cfgNum=?" );
-    $sth->execute($cfgNum);
+        "SELECT field,value from " . $self->{dbiTable} . " WHERE cfgNum=?" )
+          or $self->logError;
+    $sth->execute($cfgNum) or $self->logError;
     my ( $res, @row );
     while ( @row = $sth->fetchrow_array ) {
         $res->{ $row[0] } = $row[1];
diff --git a/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/_DBI.pm b/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/_DBI.pm
index ae7c3d00b..900f8c263 100644
--- a/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/_DBI.pm
+++ b/lemonldap-ng-common/lib/Lemonldap/NG/Common/Conf/Backends/_DBI.pm
@@ -36,8 +36,8 @@ sub available {
     my $sth =
       $self->_dbh->prepare( "SELECT DISTINCT cfgNum from "
           . $self->{dbiTable}
-          . " order by cfgNum" );
-    $sth->execute();
+          . " order by cfgNum" ) or $self->logError;
+    $sth->execute() or $self->logError;
     my @conf;
     while ( my @row = $sth->fetchrow_array ) {
         push @conf, $row[0];
@@ -105,8 +105,9 @@ sub unlock {
 sub delete {
     my ( $self, $cfgNum ) = @_;
     my $req =
-      $self->_dbh->prepare("DELETE FROM $self->{dbiTable} WHERE cfgNum=?");
-    my $res = $req->execute($cfgNum);
+      $self->_dbh->prepare("DELETE FROM $self->{dbiTable} WHERE cfgNum=?")
+        or $self->logError;
+    my $res = $req->execute($cfgNum) or $self->logError;
     $Lemonldap::NG::Common::Conf::msg .=
       "Unable to find conf $cfgNum (" . $self->_dbh->errstr . ")"
       unless ($res);