diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index e58be98430b014a40e1cd5eeba5472a39fe7419f..201c8de1853db9a90b7dcafcd8484ecf0138cdb6 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -5216,7 +5216,7 @@ static unsigned short pmcraid_get_minor(void)
 {
 	int minor;
 
-	minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
+	minor = find_first_zero_bit(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
 	__set_bit(minor, pmcraid_minor);
 	return minor;
 }