diff --git a/lib/receive/v2.dart b/lib/receive/v2.dart
index c32bed5..032eb38 100644
--- a/lib/receive/v2.dart
+++ b/lib/receive/v2.dart
@@ -84,12 +84,12 @@ class ActiveSession extends FfiActiveSession {
   /// The contents of the `&pj=` query parameter including the base64url-encoded public key receiver subdirectory.
   /// This identifies a session at the payjoin directory server.
   Future<Url> pjUrl() {
-    final res = FfiActiveSession.pjUrl(ptr: super);
+    final res = FfiActiveSession.pjUrl(ptr: this);
     return Url.fromString(res.asString());
   }
 
   PjUriBuilder pjUriBuilder() {
-    final res = FfiActiveSession.pjUriBuilder(ptr: super);
+    final res = FfiActiveSession.pjUriBuilder(ptr: this);
     return PjUriBuilder(internal: res.internal);
   }
 }