diff --git a/src/vs/workbench/browser/actions/toggleEditorLayout.ts b/src/vs/workbench/browser/actions/toggleEditorLayout.ts
index f326bc89a6bc64c3aa29e635b5567bc6bb80e41f..0f7aea662daac9c8505a07a2f76b20599398af8e 100644
--- a/src/vs/workbench/browser/actions/toggleEditorLayout.ts
+++ b/src/vs/workbench/browser/actions/toggleEditorLayout.ts
@@ -51,7 +51,7 @@ export class ToggleEditorLayoutAction extends Action {
 	}
 
 	private updateEnablement(): void {
-		this.enabled = this.editorGroupService.getStacksModel().groups.length > 1;
+		this.enabled = this.editorGroupService.getStacksModel().groups.length > 0;
 	}
 
 	public run(): TPromise<any> {