diff --git a/centreon-plugins/apps/protocols/http/mode/jsoncontent.pm b/centreon-plugins/apps/protocols/http/mode/jsoncontent.pm
index 564cc609e..102c86922 100644
--- a/centreon-plugins/apps/protocols/http/mode/jsoncontent.pm
+++ b/centreon-plugins/apps/protocols/http/mode/jsoncontent.pm
@@ -233,7 +233,7 @@ sub lookup {
     my $count = 0;
     foreach my $value (@{$self->{values}}) {
         $count++;
-        if ($value =~ /^(?:[0-9]+(?:\.[0-9]+)?|([0-9.]*)e([-+]?)(\d*))$/) {
+        if ($value =~ /^-?(?:[0-9]+(?:\.[0-9]+)?|([0-9.]*)e([-+]?)(\d*))$/) {
             my $value_expand = centreon::plugins::misc::expand_exponential(value => $value);
             if ($self->{option_results}->{threshold_value} eq 'values') {
                 my $exit = lc(