diff --git a/bitshift/query/nodes.py b/bitshift/query/nodes.py
index b2e4864..dcf297d 100644
--- a/bitshift/query/nodes.py
+++ b/bitshift/query/nodes.py
@@ -163,7 +163,7 @@ class BinaryOp(_Node):
 
 class UnaryOp(_Node):
     """Represents a transformation applied to one node: ``not``."""
-    NOT = 1
+    NOT = 3
 
     def __init__(self, op, node):
         self.op = op