diff --git a/centreon-plugins/src/check_centreon_TcpConn b/centreon-plugins/src/check_centreon_TcpConn
index a96dae2a9..89f27bb7a 100644
--- a/centreon-plugins/src/check_centreon_TcpConn
+++ b/centreon-plugins/src/check_centreon_TcpConn
@@ -27,7 +27,7 @@ use strict;
 use Net::SNMP qw(:snmp);
 use FindBin;
 use lib "$FindBin::Bin";
-use lib "@NAGIOS_PLUGINS";
+use lib "@NAGIOS_PLUGINS@";
 use utils qw($TIMEOUT %ERRORS &print_revision &support);
 if (eval "require oreon" ) {
     use oreon qw(get_parameters);