diff --git a/clock.c b/clock.c
index 5a646131..5b17ca4a 100644
--- a/clock.c
+++ b/clock.c
@@ -1312,6 +1312,7 @@ struct clock *clock_create(enum clock_type type, struct config *config,
 		max_adj = sysclk_max_freq();
 		sysclk_set_leap(0);
 	}
+	c->utc_timescale = config_get_int(config, NULL, "utc_timescale");
 	c->utc_offset_set = 0;
 	c->leap_set = 0;
 	c->time_flags = c->utc_timescale ? 0 : PTP_TIMESCALE;
diff --git a/config.c b/config.c
index b104f1bb..31682093 100644
--- a/config.c
+++ b/config.c
@@ -362,6 +362,7 @@ struct config_item config_tab[] = {
 	GLOB_ITEM_INT("use_syslog", 1, 0, 1),
 	GLOB_ITEM_STR("userDescription", ""),
 	GLOB_ITEM_INT("utc_offset", CURRENT_UTC_OFFSET, 0, INT_MAX),
+	GLOB_ITEM_INT("utc_timescale", 0, 0, 1),
 	GLOB_ITEM_INT("verbose", 0, 0, 1),
 	GLOB_ITEM_INT("write_phase_mode", 0, 0, 1),
 };
diff --git a/ptp4l.8 b/ptp4l.8
index 40c66c25..17c55fd5 100644
--- a/ptp4l.8
+++ b/ptp4l.8
@@ -969,6 +969,11 @@ The user description string. Allowed values are of the form
 name;location and contain at most 128 utf8 symbols. The default is an
 empty string.
 
+.TP
+.B utc_timescale
+By default TAI timescale is used in case of HW timestamping and UTC for
+SW timestamps. One can override this with the setting. Allowed values 0, 1.
+
 .TP
 .B utc_offset
 The current offset between TAI and UTC.