diff --git a/packages/plugin-ext/src/plugin/workspace.ts b/packages/plugin-ext/src/plugin/workspace.ts
index ab4032c17ce97..2a2419c16e393 100644
--- a/packages/plugin-ext/src/plugin/workspace.ts
+++ b/packages/plugin-ext/src/plugin/workspace.ts
@@ -71,7 +71,7 @@ export class WorkspaceExtImpl implements WorkspaceExt {
     }
 
     get name(): string | undefined {
-        if (this.workspaceFolders) {
+        if (this.workspaceFolders && this.workspaceFolders.length > 0) {
             return new Path(this.workspaceFolders[0].uri.path).base;
         }