diff --git a/pandora_server/lib/PandoraFMS/DiscoveryServer.pm b/pandora_server/lib/PandoraFMS/DiscoveryServer.pm
index 835ae1b82a..cb80b8fd96 100644
--- a/pandora_server/lib/PandoraFMS/DiscoveryServer.pm
+++ b/pandora_server/lib/PandoraFMS/DiscoveryServer.pm
@@ -432,7 +432,7 @@ sub PandoraFMS::Recon::Base::guess_os($$;$) {
     my $return = `"$self->{pa_config}->{nmap}" -sSU -T5 -F -O --osscan-limit $device 2>$DEVNULL`;
     return OS_OTHER if ($? != 0);
     my $str_os;
-    if ($return =~ /Aggressive OS guesses:(.*?)(?>\(\d+%\),)|^OS details:(.*?)\(.*\)*$/mi) {
+    if ($return =~ /Aggressive OS guesses:(.*?)(?>\(\d+%\),)|^OS details:(.*?)$/mi) {
       if(defined($1) && $1 ne "") {
         $str_os = $1;
       } else {