diff --git a/drivers/staging/comedi/drivers/adv_pci_dio.c b/drivers/staging/comedi/drivers/adv_pci_dio.c
index d23799be7ce25d49d0b6d8c11748da3d01121156..69334f6f64e875f8db836dd9106d17c0dd146a57 100644
--- a/drivers/staging/comedi/drivers/adv_pci_dio.c
+++ b/drivers/staging/comedi/drivers/adv_pci_dio.c
@@ -422,7 +422,7 @@ struct pci_dio_private {
 	unsigned short IDIFiltrHigh[8];	/*  IDI's filter value high signal */
 };
 
-static struct pci_dio_private *pci_priv = NULL;	/* list of allocated cards */
+static struct pci_dio_private *pci_priv;	/* list of allocated cards */
 
 #define devpriv ((struct pci_dio_private *)dev->private)
 #define this_board ((const struct dio_boardtype *)dev->board_ptr)