diff --git a/src/fst/fst.c b/src/fst/fst.c
index 32cd941..fbe1175 100644
--- a/src/fst/fst.c
+++ b/src/fst/fst.c
@@ -214,6 +214,15 @@
 }
 
 
+void fst_update_mac_addr(struct fst_iface *iface, const u8 *addr)
+{
+	fst_printf_iface(iface, MSG_DEBUG, "new MAC address " MACSTR,
+			 MAC2STR(addr));
+	os_memcpy(iface->own_addr, addr, sizeof(iface->own_addr));
+	fst_group_update_ie(fst_iface_get_group(iface));
+}
+
+
 enum mb_band_id fst_hw_mode_to_band(enum hostapd_hw_mode mode)
 {
 	switch (mode) {
diff --git a/src/fst/fst.h b/src/fst/fst.h
index 2967491..7ba60d5 100644
--- a/src/fst/fst.h
+++ b/src/fst/fst.h
@@ -279,6 +279,13 @@
 Boolean fst_are_ifaces_aggregated(struct fst_iface *iface1,
 				  struct fst_iface *iface2);
 
+/**
+ * fst_update_mac_addr - Notify FST about MAC address change
+ * @iface: FST interface object
+ * @addr: New MAC address
+ */
+void fst_update_mac_addr(struct fst_iface *iface, const u8 *addr);
+
 #else /* CONFIG_FST */
 
 static inline int fst_global_init(void)