diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c
index c83f5bd686cc..b86eb1e8d35c 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -130,10 +130,10 @@ static const struct pcmuio_board pcmuio_boards[] = {
 struct pcmuio_asic {
 	spinlock_t pagelock;	/* protects the page registers */
 	spinlock_t spinlock;	/* protects member variables */
-	int enabled_mask;
-	int active;
-	int stop_count;
-	int continuous;
+	unsigned int enabled_mask;
+	unsigned int stop_count;
+	unsigned int active:1;
+	unsigned int continuous:1;
 };
 
 struct pcmuio_private {