diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c
index e859b6039d8c..77599e437f37 100644
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c
@@ -2,8 +2,6 @@
 #define APCI3XXX_DIFF				1
 #define APCI3XXX_CONFIGURATION			0
 
-#define APCI3XXX_TTL_INIT_DIRECTION_PORT2	0
-
 /*
 +----------------------------------------------------------------------------+
 |                         ANALOG INPUT FUNCTIONS                             |