From e6231f5948a29d6ffc7bc96e7808dd7a09aa0228 Mon Sep 17 00:00:00 2001
From: Erik O'Leary <erik.m.oleary@gmail.com>
Date: Tue, 19 Jan 2016 14:37:59 -0600
Subject: [PATCH] Added missing optional parameter

---
 chartjs/chart.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chartjs/chart.d.ts b/chartjs/chart.d.ts
index 464655f78..3c7086de5 100644
--- a/chartjs/chart.d.ts
+++ b/chartjs/chart.d.ts
@@ -107,7 +107,7 @@ interface LinearInstance extends ChartInstance {
     getPointsAtEvent: (event: Event) => PointsAtEvent[];
     update: () => void;
     addData: (valuesArray: number[], label: string) => void;
-    removeData: () => void;
+    removeData: (index?: number) => void;
 }
 
 interface CircularInstance extends ChartInstance {