From cb2615884b0ee84ff44bc65282e211a652c2267a Mon Sep 17 00:00:00 2001
From: Chris Eppstein <chris@eppsteins.net>
Date: Wed, 5 Jul 2017 19:18:29 -0700
Subject: [PATCH] The originalSource parameter to the SourceMapSource
 constructor is optional.

---
 types/webpack-sources/index.d.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/types/webpack-sources/index.d.ts b/types/webpack-sources/index.d.ts
index 548c381978..792158d27a 100644
--- a/types/webpack-sources/index.d.ts
+++ b/types/webpack-sources/index.d.ts
@@ -186,7 +186,10 @@ export class SourceMapSource extends Source implements SourceAndMapMixin {
     _innerSourceMap: RawSourceMap;
 
     constructor(
-        value: string, name: string, sourceMap: SourceMapGenerator | RawSourceMap, originalSource: string,
+        value: string,
+        name: string,
+        sourceMap: SourceMapGenerator | RawSourceMap,
+        originalSource?: string,
         innerSourceMap?: RawSourceMap
     );