--- /dev/null
+From 8e081f1bd5c82b842ee317cd55e70f646ae31f05 Mon Sep 17 00:00:00 2001
+From: Simon Dawson <spdawson@gmail.com>
+Date: Mon, 25 Aug 2014 10:26:11 +0100
+Subject: [PATCH] Fix build error when ntpshm is false
+To: gpsd-dev@nongnu.org
+
+The build fails as follows
+
+libgpsd_core.c: In function 'ntpshm_latch':
+libgpsd_core.c:1660:24: error: 'const struct gps_type_t' has no member named 'time_offset'
+ || device->device_type->time_offset == NULL)
+ ^
+libgpsd_core.c:1663:33: error: 'const struct gps_type_t' has no member named 'time_offset'
+ fix_time += device->device_type->time_offset(device);
+ ^
+scons: *** [libgpsd_core.os] Error 1
+
+The solution is to wrap #ifdef NTPSHM_ENABLE around the ntpshm_latch function
+
+Signed-off-by: Simon Dawson <spdawson@gmail.com>
+---
+diff -Nurp a/libgpsd_core.c b/libgpsd_core.c
+--- a/libgpsd_core.c 2014-08-22 21:33:55.000000000 +0100
++++ b/libgpsd_core.c 2014-09-03 18:48:34.184931741 +0100
+@@ -1642,6 +1642,7 @@ void gpsd_zero_satellites( /*@out@*/ str
+ #endif
+ }
+
++#ifdef NTPSHM_ENABLE
+ void ntpshm_latch(struct gps_device_t *device, struct timedrift_t /*@out@*/*td)
+ /* latch the fact that we've saved a fix */
+ {
+@@ -1672,5 +1673,6 @@ void ntpshm_latch(struct gps_device_t *d
+ device->last_fixtime.clock = td->clock.tv_sec + td->clock.tv_nsec / 1e9;
+ #endif /* S_SPLINT_S */
+ }
++#endif /* NTPSHM_ENABLE */
+
+ /* end */