diff --git a/Labs/15. Programming device/lab_15.tb_system.sv b/Labs/15. Programming device/lab_15.tb_system.sv
index cbb82b1..e741cd5 100644
--- a/Labs/15. Programming device/lab_15.tb_system.sv	
+++ b/Labs/15. Programming device/lab_15.tb_system.sv	
@@ -16,7 +16,7 @@ module lab_15_tb_system();
   logic          flash_rx;
   logic          tx_o;
   logic ps2_clk, ps2_dat;
-  logic sw_i;
+  logic [15:0] sw_i;
   logic tb_rx;
   logic flashing_is_done = 0;
   logic core_reset;