diff --git a/src/vs/workbench/electron-browser/commands.ts b/src/vs/workbench/electron-browser/commands.ts
index d0c893ec3fec1825802e7a3ad57cfe6d51942670..d37a193ff54eea0a52a78e7edff41be202bddfc1 100644
--- a/src/vs/workbench/electron-browser/commands.ts
+++ b/src/vs/workbench/electron-browser/commands.ts
@@ -609,7 +609,7 @@ export function registerCommands(): void {
 						return;
 					}
 
-					tree.toggleCollapsed(focus);
+					tree.toggleCollapsed(focus[0]);
 				} else {
 					const tree = focused;
 					const focus = tree.getFocus();