diff --git a/lib/CPUs/MIPS/src/tb_mips_top.vhd b/lib/CPUs/MIPS/src/tb_mips_top.vhd
index 6a95b4b..7b619cd 100644
--- a/lib/CPUs/MIPS/src/tb_mips_top.vhd
+++ b/lib/CPUs/MIPS/src/tb_mips_top.vhd
@@ -189,6 +189,11 @@ signal_mux:
 
 ------------------------------------------------------------------
 uut: entity work.mips_top
+	GENERIC MAP
+	(
+		icache_size	=> 1024,	-- words
+		dcache_size	=> 1024		-- words
+	)
 	PORT MAP
 	(
 		debug	=> debug,