diff --git a/files/templates/operators_list.txt b/files/templates/operators_list.txt
index 03e58af..e8d3522 100644
--- a/files/templates/operators_list.txt
+++ b/files/templates/operators_list.txt
@@ -8,7 +8,7 @@ OPERATORS TESTED with Karoo GP v1.4
 
 and,2
 or,2
-not,2
+not,1
 
 
 The following must be preceded by another operator due the manner in which Karoo flattens the trees into a