diff --git a/src/base/single/tip/tip.tooltip.js b/src/base/single/tip/tip.tooltip.js
index 70c710497..eadbd05e9 100644
--- a/src/base/single/tip/tip.tooltip.js
+++ b/src/base/single/tip/tip.tooltip.js
@@ -53,6 +53,7 @@ BI.Tooltip = BI.inherit(BI.Tip, {
                         whiteSpace: "normal",
                         text: text,
                         textHeight: 18,
+                        title: null,
                     };
                 }),
             });
@@ -63,6 +64,7 @@ BI.Tooltip = BI.inherit(BI.Tip, {
                 textAlign: o.textAlign,
                 whiteSpace: "normal",
                 text: o.text,
+                title: null,
                 textHeight: 18,
                 hgap: this._const.hgap,
                 vgap: this._const.vgap,