1 files changed, 1 insertions, 1 deletions

diff --git a/include/uapi/linux/ptp_clock.h b/include/uapi/linux/ptp_clock.h
index d73d83950265..1bc794ad957a 100644
--- a/include/uapi/linux/ptp_clock.h
+++ b/include/uapi/linux/ptp_clock.h
@@ -147,7 +147,7 @@ struct ptp_pin_desc {
 #define PTP_SYS_OFFSET_PRECISE \
         _IOWR(PTP_CLK_MAGIC, 8, struct ptp_sys_offset_precise)
 #define PTP_SYS_OFFSET_EXTENDED \
-        _IOW(PTP_CLK_MAGIC, 9, struct ptp_sys_offset_extended)
+        _IOWR(PTP_CLK_MAGIC, 9, struct ptp_sys_offset_extended)
 
 struct ptp_extts_event {
         struct ptp_clock_time t; /* Time event occured. */