diff --git a/picosoc/firmware.c b/picosoc/firmware.c
index 19de4e0..c52d5d8 100644
--- a/picosoc/firmware.c
+++ b/picosoc/firmware.c
@@ -754,7 +754,7 @@ void main()
 			case 'M':
 				cmd_memtest();
 				break;
-			case 'P':
+			case 'S':
 				cmd_print_spi_state();
 				break;
 			case 'e':