diff --git a/sys/sys/pioctl.h b/sys/sys/pioctl.h
index 497bf27dece..09bb663d4a7 100644
--- a/sys/sys/pioctl.h
+++ b/sys/sys/pioctl.h
@@ -49,12 +49,12 @@ struct procfs_status {
 	unsigned long	val;	/* Any extra data */
 };
 
-# define	PIOCBIS	_IOC(IOC_IN, 'p', 1, 0)	/* Set event flag */
-# define	PIOCBIC	_IOC(IOC_IN, 'p', 2, 0)	/* Clear event flag */
-# define	PIOCSFL	_IOC(IOC_IN, 'p', 3, 0)	/* Set flags */
+# define	PIOCBIS	_IO('p', 1)	/* Set event flag */
+# define	PIOCBIC	_IO('p', 2)	/* Clear event flag */
+# define	PIOCSFL	_IO('p', 3)	/* Set flags */
 			/* wait for proc to stop */
 # define	PIOCWAIT	_IOR('p', 4, struct procfs_status)
-# define	PIOCCONT	_IOC(IOC_IN, 'p', 5, 0)	/* Continue a process */
+# define	PIOCCONT	_IO('p', 5)	/* Continue a process */
 			/* Get proc status */
 # define	PIOCSTATUS	_IOR('p', 6, struct procfs_status)
 # define	PIOCGFL	_IOR('p', 7, unsigned int)	/* Get flags */