diff --git a/contrib/gana b/contrib/gana
index 417435b17..c0fedb8d4 160000
--- a/contrib/gana
+++ b/contrib/gana
@@ -1 +1 @@
-Subproject commit 417435b17b92fa7f58c5bae1d92388633b16881c
+Subproject commit c0fedb8d45c41fb283fec714b48278e6661d51be
diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
index 38b895d7f..7f9e090a1 100644
--- a/src/include/taler_signatures.h
+++ b/src/include/taler_signatures.h
@@ -1130,10 +1130,8 @@ struct TALER_ProposalDataPS
 struct PaymentResponsePS
 {
   /**
-   * Set to TALER_SIGNATURE_MERCHANT_PAYMENT_OK so far. Note that
-   * unsuccessful payments are usually proven by some exchange's signature,
-   * thus it is unlikely that a merchant needs to set a purpose other than
-   * the above mentioned
+   * Set to #TALER_SIGNATURE_MERCHANT_PAYMENT_OK. Note that
+   * unsuccessful payments are usually proven by some exchange's signature.
    */
   struct GNUNET_CRYPTO_EccSignaturePurpose purpose;