diff --git a/protocol/esta/sacn/universearbitrator.cpp b/protocol/esta/sacn/universearbitrator.cpp
index cd62e4e..3d8e4f7 100644
--- a/protocol/esta/sacn/universearbitrator.cpp
+++ b/protocol/esta/sacn/universearbitrator.cpp
@@ -37,6 +37,7 @@ namespace sACN {
 UniverseArbitrator::UniverseArbitrator(sACN::Universe * universe)
   : m_universe(universe)
   , hold_last_look_(true)
+  , merge_mode_(MERGE_HTP)
   , m_dominant(std::weak_ptr<Universe>())
 {
 }
diff --git a/protocol/esta/sacn/universearbitrator.h b/protocol/esta/sacn/universearbitrator.h
index bbf66b3..a3eb547 100644
--- a/protocol/esta/sacn/universearbitrator.h
+++ b/protocol/esta/sacn/universearbitrator.h
@@ -47,7 +47,8 @@ class Universe;
  * > occurs, receivers must handle these sources in some way.
  *
  * If multiple universes with highest priority are recieved, the universe
- * recieved most recently will be given dominance.
+ * data will be HTP merged (default), or optionally, with the most recently
+ * recieved given dominance (LTP).
  *
  * > \cite sACN 6.2.3.2 Note on Merge and Arbitration Algorithms
  * >
@@ -64,7 +65,6 @@ public:
 
     void refresh();
 
-
     // DMX::Universe API:
     long age() const;
     uint8_t status() const;