diff --git a/drivers/staging/comedi/drivers/addi_apci_1710.c b/drivers/staging/comedi/drivers/addi_apci_1710.c
index 6bfbebeeb20e..a142129e7f7f 100644
--- a/drivers/staging/comedi/drivers/addi_apci_1710.c
+++ b/drivers/staging/comedi/drivers/addi_apci_1710.c
@@ -19,10 +19,6 @@ static void fpu_end(void)
 #include "addi-data/addi_eeprom.c"
 #include "addi-data/hwdrv_APCI1710.c"
 
-#ifndef COMEDI_SUBD_TTLIO
-#define COMEDI_SUBD_TTLIO   11	/* Digital Input Output But TTL */
-#endif
-
 static const struct addi_board apci1710_boardtypes[] = {
 	{
 		.pc_DriverName		= "apci1710",