diff --git a/location/gps.cfg b/location/gps.cfg
index 4fc7156..6a6ec32 100644
--- a/location/gps.cfg
+++ b/location/gps.cfg
@@ -24,6 +24,9 @@ gnss_device_type=K041
 gnss_device_patch_address=0
 gnss_device_patch_file=/vendor/firmware/kepler.bin
 
+# 1pps timemark output: 0: disable 1: enable
+ChipCfg_Timemark_Option=1
+
 # Enable/Disable 1PPS Time Sync policy
 Is1PPSTimeSyncEnable=1
 
diff --git a/location/gps_user.cfg b/location/gps_user.cfg
index b20dfe5..c612ea2 100644
--- a/location/gps_user.cfg
+++ b/location/gps_user.cfg
@@ -10,6 +10,7 @@ caplay_port_tcp_port=@GNSS_ISM_CAPTURE_PLAYBACK
 gnss_device_type=K041
 gnss_device_patch_address=0
 gnss_device_patch_file=/vendor/firmware/kepler.bin
+ChipCfg_Timemark_Option=1
 Is1PPSTimeSyncEnable=1
 Chip_Configuration_Dynamic_HSI=0
 Chip_Configuration_ubsan_opt=1