diff --git a/drivers/platform/tegra/nvadsp/os-t18x.c b/drivers/platform/tegra/nvadsp/os-t18x.c
index c575331e..0d5e6919 100644
--- a/drivers/platform/tegra/nvadsp/os-t18x.c
+++ b/drivers/platform/tegra/nvadsp/os-t18x.c
@@ -87,6 +87,9 @@ int nvadsp_os_t18x_init(struct platform_device *pdev)
 		/* Write to HWMBOX5 */
 		hwmbox_writel(val, drv_data->chip_data->hwmb.hwmbox5_reg);
 
+		/* Clear HWMBOX0 for ADSP Guest reset handling */
+		hwmbox_writel(0, drv_data->chip_data->hwmb.hwmbox0_reg);
+
 		return 0;
 	}