1 files changed, 4 insertions, 2 deletions

diff --git a/src/include/gnunet_consensus_service.h b/src/include/gnunet_consensus_service.h
index 6c6bcaa46..1b812290b 100644
--- a/src/include/gnunet_consensus_service.h
+++ b/src/include/gnunet_consensus_service.h
@@ -73,9 +73,11 @@ struct GNUNET_CONSENSUS_Element
  *
  * @param cls closure
  * @param element new element, NULL on error
+ * @return GNUNET_OK if the valid is well-formed and should be added to the consensus,
+ *         GNUNET_SYSERR if the element should be ignored and not be propagated
  */
-typedef void (*GNUNET_CONSENSUS_NewElementCallback) (void *cls,
-                                                     struct GNUNET_CONSENSUS_Element *element);
+typedef int (*GNUNET_CONSENSUS_NewElementCallback) (void *cls,
+                                                    struct GNUNET_CONSENSUS_Element *element);