diff --git a/src/vs/code/electron-main/main.ts b/src/vs/code/electron-main/main.ts
index e268912036d78a73f14732c936ed249964d84a97..64f64a8524122d20a303d776465bd73c52937566 100644
--- a/src/vs/code/electron-main/main.ts
+++ b/src/vs/code/electron-main/main.ts
@@ -66,7 +66,7 @@ function createServices(args: ParsedArgs, bufferLogService: BufferLogService): I
 	services.set(IStateService, new SyncDescriptor(StateService));
 	services.set(IConfigurationService, new SyncDescriptor(ConfigurationService));
 	services.set(IRequestService, new SyncDescriptor(RequestService));
-	services.set(IURLService, new SyncDescriptor(URLService, args['open-url'] ? args._urls : ''));
+	services.set(IURLService, new SyncDescriptor(URLService, args['open-url'] ? args._urls : []));
 	services.set(IBackupMainService, new SyncDescriptor(BackupMainService));
 
 	return new InstantiationService(services, true);