diff --git a/hwclock.8 b/hwclock.8
index 21b5266..8c3ac10 100644
--- a/hwclock.8
+++ b/hwclock.8
@@ -7,7 +7,8 @@
 \fBhwclock\fR is a tool for accessing the hardware clock. You can display
 the current time, set the hardware clock from the System Time, or
 set the System Time from the hardware clock. It currently only works with UTC.
-You can use \fIdev\fR to specify the RTC device node absolute path.
+You can use \fIdev\fR to specify the RTC device node absolute path. By default
+it will use \fI/dev/rtc\fR.
 .SH FUNCTIONS
 .TP
 \fB-r\fR