diff --git a/lib/bcoin/abstractblock.js b/lib/bcoin/abstractblock.js
index 7e24cc87..93a0fcdc 100644
--- a/lib/bcoin/abstractblock.js
+++ b/lib/bcoin/abstractblock.js
@@ -90,6 +90,8 @@ AbstractBlock.prototype.getSize = function getSize() {
 
 /**
  * Verify the block.
+ * @param {Object?} ret - Return object, may be
+ * set with properties `reason` and `score`.
  * @returns {Boolean}
  */