From da0961c121722f1b41b30629ef44646de4747e38 Mon Sep 17 00:00:00 2001
From: Ben McCann <322311+benmccann@users.noreply.github.com>
Date: Sat, 11 May 2019 11:30:07 -0700
Subject: [PATCH] Check if tick is defined

---
 src/scales/scale.time.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/scales/scale.time.js b/src/scales/scale.time.js
index 172c230e056..d6a3f5b0afb 100644
--- a/src/scales/scale.time.js
+++ b/src/scales/scale.time.js
@@ -677,7 +677,8 @@ module.exports = Scale.extend({
 		var minorFormat = formats[me._unit];
 		var majorUnit = me._majorUnit;
 		var majorFormat = formats[majorUnit];
-		var isMajorTime = isNaN(index) ? false : ticks[index].major;
+		var tick = !isNaN(index) && ticks[index];
+		var isMajorTime = tick && tick.major;
 		var tickOpts = options.ticks;
 		var majorTickOpts = tickOpts.major;
 		var major = majorTickOpts.enabled && majorUnit && majorFormat && isMajorTime;