diff --git a/src/ap/ieee802_1x.c b/src/ap/ieee802_1x.c
index 9035094c2..c5285aadb 100644
--- a/src/ap/ieee802_1x.c
+++ b/src/ap/ieee802_1x.c
@@ -435,6 +435,22 @@ int add_common_radius_attr(struct hostapd_data *hapd,
 		return -1;
 	}
 
+#ifdef CONFIG_INTERWORKING
+	if (hapd->conf->interworking &&
+	    !is_zero_ether_addr(hapd->conf->hessid)) {
+		os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
+			    MAC2STR(hapd->conf->hessid));
+		buf[sizeof(buf) - 1] = '\0';
+		if (!hostapd_config_get_radius_attr(req_attr,
+						    RADIUS_ATTR_WLAN_HESSID) &&
+		    !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
+					 (u8 *) buf, os_strlen(buf))) {
+			wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
+			return -1;
+		}
+	}
+#endif /* CONFIG_INTERWORKING */
+
 	if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
 		return -1;
 
diff --git a/src/radius/radius.c b/src/radius/radius.c
index 730056a0a..8bcf2f55c 100644
--- a/src/radius/radius.c
+++ b/src/radius/radius.c
@@ -235,6 +235,7 @@ static struct radius_attr_type radius_attrs[] =
 	{ RADIUS_ATTR_EAP_KEY_NAME, "EAP-Key-Name", RADIUS_ATTR_HEXDUMP },
 	{ RADIUS_ATTR_MOBILITY_DOMAIN_ID, "Mobility-Domain-Id",
 	  RADIUS_ATTR_INT32 },
+	{ RADIUS_ATTR_WLAN_HESSID, "WLAN-HESSID", RADIUS_ATTR_TEXT },
 };
 #define RADIUS_ATTRS ARRAY_SIZE(radius_attrs)
 
diff --git a/src/radius/radius.h b/src/radius/radius.h
index ff7224d90..4ff73914e 100644
--- a/src/radius/radius.h
+++ b/src/radius/radius.h
@@ -93,6 +93,7 @@ enum { RADIUS_ATTR_USER_NAME = 1,
        RADIUS_ATTR_ERROR_CAUSE = 101,
        RADIUS_ATTR_EAP_KEY_NAME = 102,
        RADIUS_ATTR_MOBILITY_DOMAIN_ID = 177,
+       RADIUS_ATTR_WLAN_HESSID = 181,
 };