diff --git a/tsplotv b/tsplotv
index a7e1a68..25803c3 100755
--- a/tsplotv
+++ b/tsplotv
@@ -48,6 +48,7 @@ my $stacked = 0;
 my $style = "lines";
 my $log_y =0;
 my $finalresolution;
+my $time_t =0;
 
 GetOptions('help|?' => \$help,
 	   'legend_position|legend-position=s'	=> \$legend_position,
@@ -56,6 +57,7 @@ GetOptions('help|?' => \$help,
 	   'style:s'				=> \$style,
 	   'log_y|log-y'			=> \$log_y,
 	   'finalresolution'		        => \$finalresolution,
+	   'time_t'			        => \$time_t,
 	  ) or pod2usage(2);
 pod2usage(1) if $help;
 
@@ -84,7 +86,11 @@ $ts->finalresolution($finalresolution) if $finalresolution;
 for my $timestamp (sort keys %data) {
     my %d = %{$data{$timestamp}};
     my @values = @d{@series};
-    $ts->add_timestring($timestamp, @values);
+    if ($time_t) {
+	$ts->add($timestamp, @values);
+    } else {
+	$ts->add_timestring($timestamp, @values);
+    }
 }
 
 my $g = $ts->plot();