diff --git a/remove-complex-oper.rkt b/remove-complex-oper.rkt
index 86ae092..0a0bab2 100644
--- a/remove-complex-oper.rkt
+++ b/remove-complex-oper.rkt
@@ -132,7 +132,7 @@
              new-tmpcount))]))
 
 ; remove complex sub-expression 
-; Transform the program into monadic normal form
+; Transform the program into administrative normal form (ANF)
 ; This version of remove-complex-opera* is more aggressive
 ; Every main expression must be saved in a temporary,
 ; and every argument (e.g. of Prim) must be a variable