diff --git a/lib/CPUs/MIPS/bsp/examples/testbench.c b/lib/CPUs/MIPS/bsp/examples/testbench.c
index 3ecc87e..5f9bf76 100644
--- a/lib/CPUs/MIPS/bsp/examples/testbench.c
+++ b/lib/CPUs/MIPS/bsp/examples/testbench.c
@@ -7,10 +7,6 @@
 #include <sys/time.h>
 #include "libsys.h"
 
-#define	NO_ERROR		0x00000000
-#define	ERROR			0x80000000
-#define	IS_ERROR(e)		((e & ERROR) == ERROR)
-
 #define	TEST10_ERROR	(ERROR | 0x10)
 #define	TEST11_ERROR	(ERROR | 0x11)
 #define	TEST12_ERROR	(ERROR | 0x12)