diff --git a/local/docs/IMPROVEMENT-PLAN.md b/local/docs/IMPROVEMENT-PLAN.md
index a0e740a5e0..324cb16822 100644
--- a/local/docs/IMPROVEMENT-PLAN.md
+++ b/local/docs/IMPROVEMENT-PLAN.md
@@ -111,7 +111,7 @@ if let Err(e) = handle.device_request(...) {
 
 **Cross-reference**: Linux 7.1 `drivers/usb/core/hub.c:4772-4778` — logs and continues on port power failure.
 
-### 2.5 Fix PortId::root_hub_port_index() panic
+### 2.5 Fix PortId::root_hub_port_index() panic ✅ DONE (2026-07-08)
 
 **File**: `recipes/core/base/source/drivers/usb/xhcid/src/driver_interface.rs:293`
 **Severity**: CRITICAL — can panic on port 0