diff --git a/lib/CPUs/MIPS/src/core/mips_top.vhd b/lib/CPUs/MIPS/src/core/mips_top.vhd
index 05959dd..3fa6408 100644
--- a/lib/CPUs/MIPS/src/core/mips_top.vhd
+++ b/lib/CPUs/MIPS/src/core/mips_top.vhd
@@ -89,6 +89,11 @@ architecture rtl of mips_top is
 
 
 	COMPONENT bui
+	GENERIC
+	(
+		icache_size	: natural;
+		dcache_size	: natural
+	);
 	PORT
 	(
 		RST_I			: in  STD_LOGIC;
@@ -148,6 +153,11 @@ inst_pipeline: pipeline
 	);
 
 inst_bui: bui
+	GENERIC MAP
+	(
+		icache_size	=> 4096,	-- words
+		dcache_size	=> 4096		-- words
+	)
 	PORT MAP
 	(
 		RST_I			=> RST_I,