diff --git a/centreon-plugins/centreon/plugins/alternative/Getopt.pm b/centreon-plugins/centreon/plugins/alternative/Getopt.pm
index f0c31da54..1d39cb448 100644
--- a/centreon-plugins/centreon/plugins/alternative/Getopt.pm
+++ b/centreon-plugins/centreon/plugins/alternative/Getopt.pm
@@ -40,7 +40,8 @@ sub get_assigned_value {
     my (%options) = @_;
     
     if (!defined($options{val}) || $options{val} eq '') {
-        if ($options{pos} + 1 < $options{num_args} && $ARGV[$options{pos} + 1] !~ /^--/) {
+        # Add defined also. Hardened code: already see: $ARGV[6] = undef for example
+        if ($options{pos} + 1 < $options{num_args} && defined($ARGV[$options{pos} + 1]) && $ARGV[$options{pos} + 1] !~ /^--/) {
             my $val = $ARGV[$options{pos} + 1];
             splice @ARGV, $options{pos} + 1, 1;
             return ($options{num_args} - 1, $val);