diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index 19d6ad324..0ec170131 100644
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -2907,6 +2907,14 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 					   "sae_groups value '%s'", line, pos);
 				return 1;
 			}
+		} else if (os_strcmp(buf, "local_pwr_constraint") == 0) {
+			int val = atoi(pos);
+			if (val < 0 || val > 255) {
+				wpa_printf(MSG_ERROR, "Line %d: Invalid local_pwr_constraint %d (expected 0..255)",
+					   line, val);
+				return 1;
+			}
+			conf->local_pwr_constraint = val;
 		} else {
 			wpa_printf(MSG_ERROR, "Line %d: unknown configuration "
 				   "item '%s'", line, buf);
diff --git a/hostapd/hostapd.conf b/hostapd/hostapd.conf
index c503ce290..63232d750 100644
--- a/hostapd/hostapd.conf
+++ b/hostapd/hostapd.conf
@@ -108,6 +108,13 @@ ssid=test
 # (default: 0 = disabled)
 #ieee80211h=1
 
+# Add Power Constraint element to Beacon and Probe Response frames
+# This config option adds Power Constraint element when applicable and Country
+# element is added. Power Constraint element is required by Transmit Power
+# Control. This can be used only with ieee80211d=1.
+# Valid values are 0..255.
+#local_pwr_constraint=3
+
 # Operation mode (a = IEEE 802.11a, b = IEEE 802.11b, g = IEEE 802.11g,
 # ad = IEEE 802.11ad (60 GHz); a/g options are used with IEEE 802.11n, too, to
 # specify band)
diff --git a/src/ap/ap_config.c b/src/ap/ap_config.c
index 368b2020e..a9e8bfac1 100644
--- a/src/ap/ap_config.c
+++ b/src/ap/ap_config.c
@@ -154,6 +154,8 @@ struct hostapd_config * hostapd_config_defaults(void)
 	conf->rts_threshold = -1; /* use driver default: 2347 */
 	conf->fragm_threshold = -1; /* user driver default: 2346 */
 	conf->send_probe_response = 1;
+	/* Set to invalid value means do not add Power Constraint IE */
+	conf->local_pwr_constraint = -1;
 
 	conf->wmm_ac_params[0] = ac_be;
 	conf->wmm_ac_params[1] = ac_bk;
@@ -829,6 +831,12 @@ int hostapd_config_check(struct hostapd_config *conf, int full_config)
 		return -1;
 	}
 
+	if (full_config && conf->local_pwr_constraint != -1 &&
+	    !conf->ieee80211d) {
+		wpa_printf(MSG_ERROR, "Cannot add Power Constraint element without Country element");
+		return -1;
+	}
+
 	for (i = 0; i < conf->num_bss; i++) {
 		if (hostapd_config_check_bss(conf->bss[i], conf, full_config))
 			return -1;
diff --git a/src/ap/ap_config.h b/src/ap/ap_config.h
index 4631ca9ed..26a0ef6c9 100644
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -519,6 +519,13 @@ struct hostapd_config {
 
 	int ieee80211h; /* DFS */
 
+	/*
+	 * Local power constraint is an octet encoded as an unsigned integer in
+	 * units of decibels. Invalid value -1 indicates that Power Constraint
+	 * element will not be added.
+	 */
+	int local_pwr_constraint;
+
 	struct hostapd_tx_queue_params tx_queue[NUM_TX_QUEUES];
 
 	/*
diff --git a/src/ap/beacon.c b/src/ap/beacon.c
index b1ebf6e3a..d84af9534 100644
--- a/src/ap/beacon.c
+++ b/src/ap/beacon.c
@@ -102,6 +102,36 @@ static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
 }
 
 
+static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
+{
+	u8 *pos = eid;
+
+	if (hapd->iconf->local_pwr_constraint == -1 ||
+	    hapd->iface->current_mode == NULL ||
+	    hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
+		return eid;
+
+	/*
+	 * A STA that is not an AP shall use a transmit power less than or
+	 * equal to the local maximum transmit power level for the channel.
+	 * The local maximum transmit power can be calculated from the formula:
+	 * local max TX pwr = max TX pwr - local pwr constraint
+	 * Where max TX pwr is maximum transmit power level specified for
+	 * channel in Country element and local pwr constraint is specified
+	 * for channel in this Power Constraint element.
+	 */
+
+	/* Element ID */
+	*pos++ = WLAN_EID_PWR_CONSTRAINT;
+	/* Length */
+	*pos++ = 1;
+	/* Local Power Constraint */
+	*pos++ = hapd->iconf->local_pwr_constraint;
+
+	return pos;
+}
+
+
 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 				    struct hostapd_channel_data *start,
 				    struct hostapd_channel_data *prev)
@@ -315,6 +345,9 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 
 	pos = hostapd_eid_country(hapd, pos, epos - pos);
 
+	/* Power Constraint element */
+	pos = hostapd_eid_pwr_constraint(hapd, pos);
+
 	/* ERP Information element */
 	pos = hostapd_eid_erp_info(hapd, pos);
 
@@ -721,6 +754,9 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 	tailpos = hostapd_eid_country(hapd, tailpos,
 				      tail + BEACON_TAIL_BUF_SIZE - tailpos);
 
+	/* Power Constraint element */
+	tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
+
 	/* ERP Information element */
 	tailpos = hostapd_eid_erp_info(hapd, tailpos);