diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
index ca8cf2dec..ef9486e49 100644
--- a/src/include/taler_signatures.h
+++ b/src/include/taler_signatures.h
@@ -880,6 +880,7 @@ struct TALER_ConfirmWirePS
    */
   struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
 
+  // FIXME: add details (#3888:10056)
 
 };