diff --git a/verilog/dv/caravel/mgmt_soc/mem/mem_tb.v b/verilog/dv/caravel/mgmt_soc/mem/mem_tb.v
index f0fbcae..eac5e68 100644
--- a/verilog/dv/caravel/mgmt_soc/mem/mem_tb.v
+++ b/verilog/dv/caravel/mgmt_soc/mem/mem_tb.v
@@ -30,7 +30,7 @@
 
 	wire gpio;
         wire [15:0] checkbits;
-	wire [36:0] mprj_io;
+	wire [37:0] mprj_io;
 	wire flash_csb;
 	wire flash_clk;
 	wire flash_io0;