diff --git a/Doc/lib/libmisc.tex b/Doc/lib/libmisc.tex
index 24881a8..306c43c 100644
--- a/Doc/lib/libmisc.tex
+++ b/Doc/lib/libmisc.tex
@@ -25,4 +25,8 @@
 --- Perl-like iteration over lines from multiple input streams, with
 ``save in place'' capability.
 
+\item[cmd]
+--- Build line-oriented command interpreters; this is used by module
+\module{pdb}.
+
 \end{description}