diff --git a/src/core/core.scale.js b/src/core/core.scale.js
index 94fea1c9347..74efdb4395a 100644
--- a/src/core/core.scale.js
+++ b/src/core/core.scale.js
@@ -202,6 +202,9 @@ function parseTickFontOptions(options) {
 }
 
 var Scale = Element.extend({
+
+	zeroLineIndex: 0,
+
 	/**
 	 * Get the padding needed for the scale
 	 * @method getPadding