diff --git a/c3.js b/c3.js
index 940388c..452e239 100644
--- a/c3.js
+++ b/c3.js
@@ -3825,7 +3825,7 @@
                 name = nameFormat(d[i].name, d[i].ratio, d[i].id, d[i].index);
                 bgcolor = $$.levelColor ? $$.levelColor(d[i].value) : color(d[i].id);
 
-                text += "<tr class='" + CLASS.tooltipName + "-" + d[i].id + "'>";
+                text += "<tr class='" + CLASS.tooltipName + $$.getTargetSelectorSuffix(d[i].id) + "'>";
                 text += "<td class='name'><span style='background-color:" + bgcolor + "'></span>" + name + "</td>";
                 text += "<td class='value'>" + value + "</td>";
                 text += "</tr>";