diff --git a/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c b/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c
index d3d0cdf40d..72188d94f6 100644
--- a/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c
+++ b/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c
@@ -95,9 +95,16 @@ void powerctl_suspend(void) {
       // immediately after exiting STOP2 mode.
       irq_key_t irq_key = irq_lock();
 
-      // Enter STOP2 mode
+      // The PWR clock is disabled after system initialization.
+      // Re-enable it before writing to PWR registers.
+      __HAL_RCC_PWR_CLK_ENABLE();
+
+      // Enter STOP2 low-power mode
       HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
 
+      // Disable PWR clock after use
+      __HAL_RCC_PWR_CLK_DISABLE();
+
       // Recover system clock
       SystemInit();
 
diff --git a/core/site_scons/models/T3W1/trezor_t3w1_revA0.py b/core/site_scons/models/T3W1/trezor_t3w1_revA0.py
index 92697f412d..b247b6bafe 100644
--- a/core/site_scons/models/T3W1/trezor_t3w1_revA0.py
+++ b/core/site_scons/models/T3W1/trezor_t3w1_revA0.py
@@ -129,6 +129,7 @@ def configure(
         ]
         features_available.append("usb")
         paths += ["embed/io/usb/inc"]
+        defines += [("USE_USB", "1")]
 
     defines += [
         "FRAMEBUFFER",