diff --git a/tty-keys.c b/tty-keys.c
index de5dd8f2..105ab5f1 100644
--- a/tty-keys.c
+++ b/tty-keys.c
@@ -1314,11 +1314,16 @@ tty_keys_device_attributes(struct tty *tty, const char *buf, size_t len,
 			break;
 	}
 
-	/* Add terminal features. */
+	/*
+	 * Add terminal features. Technically, VT420 and VT525 do not support
+	 * SIXEL, but some modern terminals report it anyway so we accept it
+	 * here too.
+	 */
 	switch (p[0]) {
 	case 62: /* VT220 */
 	case 63: /* VT320 */
 	case 64: /* VT420 */
+	case 65: /* VT525 */
 		for (i = 1; i < n; i++) {
 			log_debug("%s: DA feature: %d", c->name, p[i]);
 			if (p[i] == 4)