diff --git a/hermes_cli/main.py b/hermes_cli/main.py
index a178daf581e..3016dc887e8 100644
--- a/hermes_cli/main.py
+++ b/hermes_cli/main.py
@@ -1152,7 +1152,7 @@ def _make_tui_argv(tui_dir: Path, tui_dev: bool) -> tuple[list[str], Path]:
         bundled = _find_bundled_tui()
         if bundled is not None:
             node = _node_bin("node")
-            return [node, str(bundled)], bundled.parent
+            return [node, "--expose-gc", str(bundled)], bundled.parent
 
     # 2. Normal flow: npm install if needed, always esbuild, then node dist/entry.js.
     #    --dev flow: npm install if needed, then tsx src/entry.tsx.