diff --git a/centreon-plugins/apps/protocols/snmp/mode/responsetime.pm b/centreon-plugins/apps/protocols/snmp/mode/responsetime.pm
index e2b65393a..c1a70cdda 100644
--- a/centreon-plugins/apps/protocols/snmp/mode/responsetime.pm
+++ b/centreon-plugins/apps/protocols/snmp/mode/responsetime.pm
@@ -127,7 +127,7 @@ sub manage_selection {
     }
 
     $self->{global} = {
-        rta => $total_time_elapsed * 1000 / $self->{option_packets},
+        rta => $total_time_elapsed * 1000 / ($self->{option_packets} - $total_packet_lost),
         rtmax => $max_time_elapsed * 1000,
         rtmin => $min_time_elapsed * 1000,
         pl => int($total_packet_lost * 100 / $self->{option_packets}),