diff --git a/book.tex b/book.tex
index b134f62..ea63410 100644
--- a/book.tex
+++ b/book.tex
@@ -16295,7 +16295,7 @@ \section{Remove Complex Operands}
   \gray{\LtupMonadASTPython} \\ \hline
   \LfunMonadASTPython \\
   \begin{array}{rcl}
-     \LangFunANFM{} &::=& \PROGRAM{}{\LS \Def \ldots \Stmt \ldots \RS}
+     \LangFunANFM{} &::=& \PROGRAM{}{\LS \Def \ldots \mainDef \RS}
   \end{array}
 \end{array}
 \]