diff --git a/centreon-plugins/centreon/plugins/script.pm b/centreon-plugins/centreon/plugins/script.pm
index d0e224edc..9c4d3cbe1 100644
--- a/centreon-plugins/centreon/plugins/script.pm
+++ b/centreon-plugins/centreon/plugins/script.pm
@@ -52,7 +52,7 @@ sub new {
 sub prepare_destroy {
     my ($self) = @_;
 
-    %handlers = undef;
+    %handlers = ();
 }
 
 sub set_signal_handlers {