diff --git a/lib/CPUs/MIPS/src/tb_mips_top.vhd b/lib/CPUs/MIPS/src/tb_mips_top.vhd
index c044a61..16cc8a2 100644
--- a/lib/CPUs/MIPS/src/tb_mips_top.vhd
+++ b/lib/CPUs/MIPS/src/tb_mips_top.vhd
@@ -42,7 +42,7 @@ ARCHITECTURE behavior OF tb_mips_top IS
 	constant SRAM_ADDR_WIDTH		: integer := 17;		-- bits
 	constant FLASH_ADDR_WIDTH		: integer := 17;		-- bits
 	
-	signal debug				: chip_debug_t;
+	signal debug				: unsigned(1 downto 0);
 
 	-- Master 
 	signal nmi					: STD_LOGIC := '0';