diff --git a/contrib/ntp/html/driver42.html b/contrib/ntp/html/driver42.html
deleted file mode 100644
index 3622b84b3f0..00000000000
--- a/contrib/ntp/html/driver42.html
+++ /dev/null
@@ -1,39 +0,0 @@
-
-
-
-
- Zyfer GPStarplus Receiver
-
-
-
-Zyfer GPStarplus Receiver
-
-
-Synopsis
-Address: 127.127.42.u
-
Reference ID: GPS
-
Driver ID: Zyfer GPStarplus
-
Serial Port: /dev/zyferu; 9600 baud, 8-bits, no parity
-
Features: (none)
-
-Description
-This driver supports the Zyfer GPStarplus
-receiver.
-
-The receiver has a DB15 port on the back which has input TxD and RxD
-lines for configuration and control, and a separate TxD line for the
-once-per-second timestamp.
-
-
Additionally, there are BNC connectors on the back for things like PPS
-and IRIG output.
-
-
-Additional Information
-
-
Reference Clock Drivers
-
-
-Harlan Stenn (stenn@whimsy.udel.edu)
-
-
-
diff --git a/contrib/ntp/ntpd/ntp_control.c b/contrib/ntp/ntpd/ntp_control.c
index af667b5eda3..1d428a29d1e 100644
--- a/contrib/ntp/ntpd/ntp_control.c
+++ b/contrib/ntp/ntpd/ntp_control.c
@@ -403,6 +403,8 @@ static u_char clocktypes[] = {
CTL_SST_TS_LF, /* REFCLK_JJY (40) */
CTL_SST_TS_UHF, /* REFCLK_TT560 (41) */
CTL_SST_TS_UHF, /* REFCLK_ZYFER (42) */
+ CTL_SST_TS_UHF, /* REFCLK_RIPENCC (43) */
+ CTL_SST_TS_UHF, /* REFCLK_NEOCLOCK4X (44) */
};