diff --git a/src/circuit/transport.js b/src/circuit/transport.js
index eaf031d8..fc2ddad4 100644
--- a/src/circuit/transport.js
+++ b/src/circuit/transport.js
@@ -24,6 +24,7 @@ const transportSymbol = Symbol.for('@libp2p/js-libp2p-circuit/circuit')
  * @typedef {import('multiaddr')} Multiaddr
  * @typedef {import('libp2p-interfaces/src/connection').Connection} Connection
  * @typedef {import('libp2p-interfaces/src/stream-muxer/types').MuxedStream} MuxedStream
+ * @typedef {import('../types').CircuitRequest} CircuitRequest
  */
 
 class Circuit {
@@ -53,6 +54,7 @@ class Circuit {
    * @param {MuxedStream} props.stream
    */
   async _onProtocol ({ connection, stream }) {
+    /** @type {import('./circuit/stream-handler')<CircuitRequest>} */
     const streamHandler = new StreamHandler({ stream })
     const request = await streamHandler.read()
 
diff --git a/src/index.js b/src/index.js
index 7e620403..c22b022d 100644
--- a/src/index.js
+++ b/src/index.js
@@ -394,7 +394,7 @@ class Libp2p extends EventEmitter {
    *
    * @async
    * @param {PeerId|Multiaddr|string} peer - The peer to dial
-   * @param {null|string[]|string} protocols
+   * @param {string[]|string} protocols
    * @param {object} [options]
    * @param {AbortSignal} [options.signal]
    * @returns {Promise<Connection|*>}
diff --git a/src/record/peer-record/index.js b/src/record/peer-record/index.js
index 4ded73c4..a0421f6e 100644
--- a/src/record/peer-record/index.js
+++ b/src/record/peer-record/index.js
@@ -65,10 +65,14 @@ class PeerRecord {
   /**
    * Returns true if `this` record equals the `other`.
    *
-   * @param {PeerRecord} other
-   * @returns {other is Record}
+   * @param {unknown} other
+   * @returns {boolean}
    */
   equals (other) {
+    if (!(other instanceof PeerRecord)) {
+      return false
+    }
+
     // Validate PeerId
     if (!this.peerId.equals(other.peerId)) {
       return false