diff --git a/Labs/13. Peripheral units/lab_13.tb_processor_system.sv b/Labs/13. Peripheral units/lab_13.tb_processor_system.sv
index dc71f1d..857cef3 100644
--- a/Labs/13. Peripheral units/lab_13.tb_processor_system.sv	
+++ b/Labs/13. Peripheral units/lab_13.tb_processor_system.sv	
@@ -38,7 +38,7 @@ initial begin
   resetn = 1;
 end
 
-riscv_unit dut(
+riscv_unit DUT(
   .clk_i    (clk_i    ),
   .resetn_i (resetn   ),
   .sw_i     (sw_i     ),