diff --git a/js/id/ui/intro/line.js b/js/id/ui/intro/line.js
index 0e552111b..780e46a7a 100644
--- a/js/id/ui/intro/line.js
+++ b/js/id/ui/intro/line.js
@@ -23,7 +23,7 @@ iD.ui.intro.line = function(context, reveal) {
         var intersection = [-85.62974496187628, 41.95742515554585];
 
         context.map().centerZoom(start, 18);
-        reveal('button.add-line', t('intro.lines.add'), {tooltipClass: 'intro-areas-add'});
+        reveal('button.add-line', t('intro.lines.add'), {tooltipClass: 'intro-lines-add'});
 
         context.on('enter.intro', addLine);