add two missing items
diff --git a/Doc/lib/libdis.tex b/Doc/lib/libdis.tex
index d0354c6..26ba967 100644
--- a/Doc/lib/libdis.tex
+++ b/Doc/lib/libdis.tex
@@ -78,6 +78,10 @@
Sequence of operation names, indexable using the byte code.
\end{datadesc}
+\begin{datadesc}{opmap}
+Dictionary mapping byte codes to operation names.
+\end{datadesc}
+
\begin{datadesc}{cmp_op}
Sequence of all compare operation names.
\end{datadesc}
@@ -688,3 +692,9 @@
keyword arguments dictionary, followed by the variable-arguments
tuple, followed by explicit keyword and positional arguments.
\end{opcodedesc}
+
+\begin{opcodedesc}{HAVE_ARGUMENT}{}
+This is not really an opcode. It identifies the dividing line between
+opcodes which don't take arguments \code{< HAVE_ARGUMENT} and those which do
+\code{>= HAVE_ARGUMENT}.
+\end{opcodedesc}