diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
index e17a69bcc..a2271130e 100644
--- a/src/include/taler_signatures.h
+++ b/src/include/taler_signatures.h
@@ -531,6 +531,7 @@ struct TALER_MintKeySetPS
    */
   struct GNUNET_TIME_AbsoluteNBO list_issue_date;
 
+  /**
    * Hash over the various denomination signing keys returned.
    */
   struct GNUNET_HashCode hc;