Fix reference to distanceBetweenPoints (#6962)

diff --git a/src/core/core.tooltip.js b/src/core/core.tooltip.js
index 0300d6af1a944a3cae78201f314e09265de578bc..e00b486e78fe1cfe51a18af5d0c892fe9853b59b 100644 (file)
--- a/src/core/core.tooltip.js
+++ b/src/core/core.tooltip.js
@@ -159,7 +159,7 @@ var positioners = {
                        var el = elements[i].element;
                        if (el && el.hasValue()) {
                                var center = el.getCenterPoint();
-                               var d = helpers.distanceBetweenPoints(eventPosition, center);
+                               var d = helpers.math.distanceBetweenPoints(eventPosition, center);
 
                                if (d < minDistance) {
                                        minDistance = d;