diff --git a/ccid_host/cuart_driver_tty.c b/ccid_host/cuart_driver_tty.c
index 5f635b5..42a8430 100644
--- a/ccid_host/cuart_driver_tty.c
+++ b/ccid_host/cuart_driver_tty.c
@@ -284,7 +284,9 @@
 	case CUART_CTL_WTIME:
 		/* no driver-specific handling of this */
 		break;
-	case CUART_CTL_POWER:
+	case CUART_CTL_POWER_5V0:
+	case CUART_CTL_POWER_3V0:
+	case CUART_CTL_POWER_1V8:
 	case CUART_CTL_CLOCK:
 	default:
 		return -EINVAL;