1 files changed, 2 insertions, 2 deletions
diff --git a/node_modules/tslint/lib/error.d.ts b/node_modules/tslint/lib/error.d.ts
index 471e1100b..2b87c5cb0 100644
--- a/node_modules/tslint/lib/error.d.ts
+++ b/node_modules/tslint/lib/error.d.ts
@@ -14,9 +14,9 @@ export declare class Error {
  */
 export declare class FatalError extends Error {
     message: string;
-    innerError: Error;
+    innerError: Error | undefined;
     static NAME: string;
-    constructor(message: string, innerError?: Error);
+    constructor(message: string, innerError?: Error | undefined);
 }
 export declare function isError(possibleError: any): possibleError is Error;
 export declare function showWarningOnce(message: string): void;