diff --git a/master/slave.c b/master/slave.c
index 955b6d0c..5765a834 100644
--- a/master/slave.c
+++ b/master/slave.c
@@ -530,8 +530,10 @@ size_t ec_slave_info(const ec_slave_t *slave, /**< EtherCAT slave */
     off += ec_state_string(slave->current_state, buffer + off);
     off += sprintf(buffer + off, "\nRing position: %i\n",
                    slave->ring_position);
-    off += sprintf(buffer + off, "Advanced position: %i:%i\n\n",
+    off += sprintf(buffer + off, "Advanced position: %i:%i\n",
                    slave->coupler_index, slave->coupler_subindex);
+    off += sprintf(buffer + off, "Coupler: %s\n\n",
+                   ec_slave_is_coupler(slave) ? "yes" : "no");
 
     off += sprintf(buffer + off, "Data link status:\n");
     for (i = 0; i < 4; i++) {
diff --git a/script/lsec.pl b/script/lsec.pl
index 6f5e5ff0..143b8acf 100755
--- a/script/lsec.pl
+++ b/script/lsec.pl
@@ -37,20 +37,45 @@
 #
 #------------------------------------------------------------------------------
 
+require 'sys/ioctl.ph';
+
 use strict;
 use Getopt::Std;
 
 my $master_index;
 my $master_dir;
+my $term_width;
 
 #------------------------------------------------------------------------------
 
+$term_width = &get_terminal_width;
 &get_options;
 &query_master;
 exit 0;
 
 #------------------------------------------------------------------------------
 
+sub get_terminal_width
+{
+    my $winsize;
+    die "no TIOCGWINSZ " unless defined &TIOCGWINSZ;
+    open(TTY, "+</dev/tty") or die "No tty: $!";
+    unless (ioctl(TTY, &TIOCGWINSZ, $winsize='')) {
+	die sprintf "$0: ioctl TIOCGWINSZ (%08x: $!)\n", &TIOCGWINSZ;
+    }
+    (my $row, my $col, my $xpixel, my $ypixel) = unpack('S4', $winsize);
+    return $col;
+}
+#------------------------------------------------------------------------------
+
+sub print_line
+{
+    for (my $i = 0; $i < $term_width; $i++) {print "-";}
+    print "\n";
+}
+
+#------------------------------------------------------------------------------
+
 sub query_master
 {
     $master_dir = "/sys/ethercat" . $master_index;
@@ -94,6 +119,9 @@ sub query_slaves
 			elsif ($line =~ /^State: (.+)$/) {
 				$slave->{'state'} = $1;
 			}
+			elsif ($line =~ /^Coupler: ([a-z]+)$/) {
+				$slave->{'coupler'} = $1;
+			}
 		}
 
 		close INFO;
@@ -106,10 +134,11 @@ sub query_slaves
 
     print "EtherCAT bus listing for master $master_index:\n";
     for $slave (@slaves) {
-		$abs = sprintf "%i", $slave->{'ring_position'};
-		printf(" %3s %8s  %-6s  %s\n",
-			   $abs, $slave->{'advanced_position'},
-			   $slave->{'state'}, $slave->{'name'});
+	print_line if $slave->{'coupler'} eq "yes";
+	$abs = sprintf "%i", $slave->{'ring_position'};
+	printf(" %3s %8s  %-6s  %s\n",
+	       $abs, $slave->{'advanced_position'},
+	       $slave->{'state'}, $slave->{'name'});
     }
 }