diff --git a/src/browser/Linkifier.ts b/src/browser/Linkifier.ts
index a5454ac5..53a32aa7 100644
--- a/src/browser/Linkifier.ts
+++ b/src/browser/Linkifier.ts
@@ -211,7 +211,7 @@ export class Linkifier implements ILinkifier {
    */
   private _doLinkifyRow(rowIndex: number, text: string, matcher: ILinkMatcher): void {
     // clone regex to do a global search on text
-    const rex = new RegExp(matcher.regex.source, matcher.regex.flags + 'g');
+    const rex = new RegExp(matcher.regex.source, (matcher.regex.flags || '') + 'g');
     let match;
     let stringIndex = -1;
     while ((match = rex.exec(text)) !== null) {
diff --git a/webpack.config.js b/webpack.config.js
index 3f55dda3..a9a60241 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -35,7 +35,6 @@ module.exports = {
   output: {
     filename: 'xterm.js',
     path: path.resolve('./lib'),
-    library: 'Terminal',
     libraryTarget: 'umd'
   },
   mode: 'production'