diff --git a/util/TweenChannel.gd b/util/TweenChannel.gd
index f676c96..da1471c 100644
--- a/util/TweenChannel.gd
+++ b/util/TweenChannel.gd
@@ -19,10 +19,16 @@ enum ArbitrationMode {
 ## and it changes while the call is yielding, then the in-progress call
 ## still will not return until its turn, as though arbitration_mode
 ## were still YIELD.
-var arbitration_mode := ArbitrationMode.REPLACE
+var arbitration_mode: ArbitrationMode
 ## Tween currently running if any, else null.
 var current_tween: Tween = null
 
+## Initializer. Sets arbitration mode.
+func _init(
+	p_arbitration_mode: ArbitrationMode = ArbitrationMode.YIELD
+) -> void:
+	arbitration_mode = p_arbitration_mode
+
 ## Returns target.create_tween() if and when arbitration_mode allows.
 ##
 ## "If:" if arbitration_mode is IGNORE and there is a current tween,