1 files changed, 4 insertions, 0 deletions
diff --git a/libgpsd_core.c b/libgpsd_core.c
index a674ae9d..58bdc805 100644
--- a/libgpsd_core.c
+++ b/libgpsd_core.c
@@ -554,6 +554,10 @@ int gpsd_activate(struct gps_device_t *session, const int mode)
     // cppcheck-suppress pointerLessThanZero
     if (session->gpsdata.gps_fd < 0) {
         /* return could be -1, PLACEHOLDING_FD, of UNALLOCATED_FD */
+        if ( PLACEHOLDING_FD == session->gpsdata.gps_fd ) {
+            /* it is /dev/ppsX, need to set devicename, etc. */
+	    gpsd_clear(session);
+        }
 	return session->gpsdata.gps_fd;
     }