diff --git a/gps.xml.b3 b/gps.xml.b3
index 17c8a9c..e7dcb9c 100644
--- a/gps.xml.b3
+++ b/gps.xml.b3
@@ -56,9 +56,11 @@
        CpLppeUseAgnssLocForEmptyDbh="true"
        ReAidingOnHotStart="false"
        ReAidingIntervalSec="1200"
+       PpsDevice="/sys/class/pps/pps0/assert_elapsed"
   />
 
   <gll
+       PpsEnable="true"
        LogPriMask="LOG_INFO"
        LogFacMask="LOG_NMEA | LOG_GLLIOS | LOG_GLLAPI"
        FrqPlan="FRQ_PLAN_26MHZ_2PPM_49_152MHZ_300PPB"
diff --git a/gps_user.xml.b3 b/gps_user.xml.b3
index d752cc9..a1e3ea0 100644
--- a/gps_user.xml.b3
+++ b/gps_user.xml.b3
@@ -55,9 +55,11 @@
        CpLppeUseAgnssLocForEmptyDbh="true"
        ReAidingOnHotStart="false"
        ReAidingIntervalSec="1200"
+       PpsDevice="/sys/class/pps/pps0/assert_elapsed"
   />
 
   <gll
+       PpsEnable="true"
        LogPriMask="LOG_INFO"
        LogFacMask="LOG_NMEA | LOG_GLLIOS | LOG_GLLAPI"
        FrqPlan="FRQ_PLAN_26MHZ_2PPM_49_152MHZ_300PPB"