diff --git a/dist/js/bootstrap.js b/dist/js/bootstrap.js
index 4139b6fc3b..829e82e2bf 100644
--- a/dist/js/bootstrap.js
+++ b/dist/js/bootstrap.js
@@ -1499,10 +1499,10 @@ if (typeof jQuery === 'undefined') {
     this.replaceArrow(arrowDelta, $tip[0][arrowOffsetPosition], isVertical)
   }
 
-  Tooltip.prototype.replaceArrow = function (delta, dimension, isHorizontal) {
+  Tooltip.prototype.replaceArrow = function (delta, dimension, isVertical) {
     this.arrow()
-      .css(isHorizontal ? 'left' : 'top', 50 * (1 - delta / dimension) + '%')
-      .css(isHorizontal ? 'top' : 'left', '')
+      .css(isVertical ? 'left' : 'top', 50 * (1 - delta / dimension) + '%')
+      .css(isVertical ? 'top' : 'left', '')
   }
 
   Tooltip.prototype.setContent = function () {