diff --git a/packages/interface-connection-encrypter/src/index.ts b/packages/interface-connection-encrypter/src/index.ts
index 7049505da..27868fa7c 100644
--- a/packages/interface-connection-encrypter/src/index.ts
+++ b/packages/interface-connection-encrypter/src/index.ts
@@ -21,6 +21,6 @@ export interface ConnectionEncrypter<Extension = unknown> {
 
 export interface SecuredConnection<E> {
   conn: Duplex<Uint8Array>
-  remoteExtensions: E
+  remoteExtensions?: E
   remotePeer: PeerId
 }