diff --git a/src/vs/workbench/api/electron-browser/mainThreadWebview.ts b/src/vs/workbench/api/electron-browser/mainThreadWebview.ts
index b8dba6902ed..b4943cc15fe 100644
--- a/src/vs/workbench/api/electron-browser/mainThreadWebview.ts
+++ b/src/vs/workbench/api/electron-browser/mainThreadWebview.ts
@@ -77,7 +77,10 @@ export class MainThreadWebviews implements MainThreadWebviewsShape, WebviewReviv
 			mainThreadShowOptions.group = viewColumnToEditorGroup(this._editorGroupService, showOptions.viewColumn);
 		}
 
-		const webview = this._webviewService.createWebview(MainThreadWebviews.viewType, title, mainThreadShowOptions, options, URI.revive(extensionLocation), this.createWebviewEventDelegate(handle));
+		const webview = this._webviewService.createWebview(MainThreadWebviews.viewType, title, mainThreadShowOptions, {
+			...options,
+			localResourceRoots: Array.isArray(options.localResourceRoots) ? options.localResourceRoots.map(URI.revive) : undefined
+		}, URI.revive(extensionLocation), this.createWebviewEventDelegate(handle));
 		webview.state = {
 			viewType: viewType,
 			state: undefined