diff --git a/src/adapter.c b/src/adapter.c
index cac90b0..056e363 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -4342,6 +4342,18 @@ static void load_default_system_params(struct btd_adapter *adapter)
 			goto done;
 	}
 
+	if (btd_opts.defaults.le.advmon_allowlist_scan_duration) {
+		if (!mgmt_tlv_add_fixed(tlv_list, 0x001d,
+			&btd_opts.defaults.le.advmon_allowlist_scan_duration))
+			goto done;
+	}
+
+	if (btd_opts.defaults.le.advmon_no_filter_scan_duration) {
+		if (!mgmt_tlv_add_fixed(tlv_list, 0x001e,
+			&btd_opts.defaults.le.advmon_no_filter_scan_duration))
+			goto done;
+	}
+
 	err = mgmt_send_tlv(adapter->mgmt, MGMT_OP_SET_DEF_SYSTEM_CONFIG,
 			adapter->dev_id, tlv_list, NULL, NULL, NULL);
 
diff --git a/src/btd.h b/src/btd.h
index 4cd1175..b0df77f 100644
--- a/src/btd.h
+++ b/src/btd.h
@@ -71,6 +71,9 @@ struct btd_le_defaults {
 	uint16_t	conn_latency;
 	uint16_t	conn_lsto;
 	uint16_t	autoconnect_timeout;
+
+	uint16_t	advmon_allowlist_scan_duration;
+	uint16_t	advmon_no_filter_scan_duration;
 };
 
 struct btd_defaults {
diff --git a/src/main.c b/src/main.c
index 0ae4501..47887a4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -114,6 +114,8 @@ static const char *le_options[] = {
 	"ConnectionLatency",
 	"ConnectionSupervisionTimeout",
 	"Autoconnecttimeout",
+	"AdvMonAllowlistScanDuration",
+	"AdvMonNoFilterScanDuration",
 	NULL
 };
 
@@ -497,6 +499,16 @@ static void parse_le_config(GKeyFile *config)
 		  sizeof(btd_opts.defaults.le.autoconnect_timeout),
 		  0x0001,
 		  0x4000},
+		{ "AdvMonAllowlistScanDuration",
+		  &btd_opts.defaults.le.advmon_allowlist_scan_duration,
+		  sizeof(btd_opts.defaults.le.advmon_allowlist_scan_duration),
+		  1,
+		  10000},
+		{ "AdvMonNoFilterScanDuration",
+		  &btd_opts.defaults.le.advmon_no_filter_scan_duration,
+		  sizeof(btd_opts.defaults.le.advmon_no_filter_scan_duration),
+		  1,
+		  10000},
 	};
 
 	if (btd_opts.mode == BT_MODE_BREDR)
diff --git a/src/main.conf b/src/main.conf
index 1b34982..a3f2020 100644
--- a/src/main.conf
+++ b/src/main.conf
@@ -160,6 +160,13 @@
 #ConnectionSupervisionTimeout=
 #Autoconnecttimeout=
 
+# Scan duration during interleaving scan. Only used when scanning for ADV
+# monitors. The units are msec.
+# Default: 300
+#AdvMonAllowlistScanDuration=
+# Default: 500
+#AdvMonNoFilterScanDuration=
+
 [GATT]
 # GATT attribute cache.
 # Possible values: