diff --git a/fhem/FHEM/98_backup.pm b/fhem/FHEM/98_backup.pm
index a4a09fdf2..52312edf1 100644
--- a/fhem/FHEM/98_backup.pm
+++ b/fhem/FHEM/98_backup.pm
@@ -47,12 +47,15 @@ sub
 CommandBackup($$)
 {
   my ($cl, $param) = @_;
+
   my $modpath = $attr{global}{modpath};
   my $configfile = (!defined($attr{global}{configfile}) ? undef : $attr{global}{configfile});
   my $statefile  = (!defined($attr{global}{statefile}) ? undef : $attr{global}{statefile});
   my $msg;
   my $ret;
 
+  return "Backup is not supported for configDB" if($configfile eq 'configDB');
+
   # set backupdir
   my $backupdir;
   if (!defined($attr{global}{backupdir})) {
diff --git a/fhem/FHEM/98_update.pm b/fhem/FHEM/98_update.pm
index 3b8f787c1..fdabb1e29 100644
--- a/fhem/FHEM/98_update.pm
+++ b/fhem/FHEM/98_update.pm
@@ -432,7 +432,9 @@ update_DoUpdate(@)
   }
 
   # do a backup first
-  my $doBackup = (!defined($attr{global}{backup_before_update}) ? 1 : $attr{global}{backup_before_update});
+  my $configfile = AttrVal("global", "configfile", "");
+  my $doBackup = AttrVal("global", "backup_before_update",
+                        ($configfile ne 'configDB'));
 
   if ($doBackup) {
     my $cmdret = AnalyzeCommand(undef, "backup");