diff --git a/sam/onyx/hw_nodes/merge_node.py b/sam/onyx/hw_nodes/merge_node.py
index f759b235..bf0ee8b4 100644
--- a/sam/onyx/hw_nodes/merge_node.py
+++ b/sam/onyx/hw_nodes/merge_node.py
@@ -3,7 +3,7 @@
 
 
 class MergeNode(HWNode):
-    def __init__(self, name=None, outer=None, inner=None, mode=False) -> None:
+    def __init__(self, name=None, outer=None, inner=None, mode=None) -> None:
         super().__init__(name=name)
         self.outer = outer
         self.inner = inner