diff --git a/src/vs/workbench/services/workspace/electron-browser/workspaceEditingService.ts b/src/vs/workbench/services/workspace/electron-browser/workspaceEditingService.ts
index 95f23606581621bc10ff44a56f3df4a941e35c48..b09b8d1d5202c4f79ea5fc4ee73e0dae73b895ee 100644
--- a/src/vs/workbench/services/workspace/electron-browser/workspaceEditingService.ts
+++ b/src/vs/workbench/services/workspace/electron-browser/workspaceEditingService.ts
@@ -244,7 +244,7 @@ export class WorkspaceEditingService implements IWorkspaceEditingService {
 	}
 
 	async createAndEnterWorkspace(folders: IWorkspaceFolderCreationData[], path?: URI): Promise<void> {
-		if (path && !this.isValidTargetWorkspacePath(path)) {
+		if (path && !await this.isValidTargetWorkspacePath(path)) {
 			return Promise.reject(null);
 		}
 		const remoteAuthority = this.environmentService.configuration.remoteAuthority;
@@ -258,7 +258,7 @@ export class WorkspaceEditingService implements IWorkspaceEditingService {
 	}
 
 	async saveAndEnterWorkspace(path: URI): Promise<void> {
-		if (!this.isValidTargetWorkspacePath(path)) {
+		if (!await this.isValidTargetWorkspacePath(path)) {
 			return Promise.reject(null);
 		}
 		const workspaceIdentifier = this.getCurrentWorkspaceIdentifier();