diff --git a/wpa_supplicant/ctrl_iface.c b/wpa_supplicant/ctrl_iface.c
index 0c79d5257..e140a3e38 100644
--- a/wpa_supplicant/ctrl_iface.c
+++ b/wpa_supplicant/ctrl_iface.c
@@ -919,6 +919,8 @@ static int wpa_supplicant_ctrl_iface_get(struct wpa_supplicant *wpa_s,
 		return wpa_snprintf_hex(buf, buflen,
 					wpa_sm_get_anonce(wpa_s->wpa),
 					WPA_NONCE_LEN);
+	} else if (os_strcasecmp(cmd, "last_tk_key_idx") == 0) {
+		res = os_snprintf(buf, buflen, "%d", wpa_s->last_tk_key_idx);
 #endif /* CONFIG_TESTING_OPTIONS */
 	} else {
 		res = wpa_config_get_value(cmd, wpa_s->conf, buf, buflen);