diff --git a/sbin/ngcp-sync-constants b/sbin/ngcp-sync-constants
index beb6f6b3..b00fa789 100755
--- a/sbin/ngcp-sync-constants
+++ b/sbin/ngcp-sync-constants
@@ -515,7 +515,7 @@ sub copy_passwords {
 }
 
 sub do_pair_sync {
-	my $dbhost = $config->[0]->{database}->{pair}->{dbhost} || "127.0.0.1";
+	my $dbhost = $config->[0]->{database}->{pair}->{dbhost} || "localhost";
 	my $dbport = $config->[0]->{database}->{pair}->{dbport} || 3306;
 
 	system("/usr/share/ngcp-ngcpcfg/helper/check-for-mysql");
@@ -556,7 +556,7 @@ sub get_slave_hosts {
 
 sub do_grant_slaves
 {
-	my $dbhost = $config->[0]->{database}->{pair}->{dbhost} || "127.0.0.1";
+	my $dbhost = $config->[0]->{database}->{pair}->{dbhost} || "localhost";
 	my $dbport = $config->[0]->{database}->{pair}->{dbport} || 3306;
 	my $user = $yml->[0]->{mysql}->{repuser};
 	my $pwd =  $yml->[0]->{mysql}->{reppassword};
@@ -595,7 +595,7 @@ sub do_slave_sync
 {
 	my $dbhost = $yml->[0]->{database}->{dbhost};
 	my $dbport = $yml->[0]->{database}->{dbport};
-	my $mhost = $config->[0]->{database}->{central}->{dbhost} || "127.0.0.1";
+	my $mhost = $config->[0]->{database}->{central}->{dbhost} || "localhost";
 	my $mport = $config->[0]->{database}->{central}->{dbport} || 3306;
 	my $user = $yml->[0]->{mysql}->{repuser};
 	my $pass = $yml->[0]->{mysql}->{reppassword};