Added entry for wdb.
diff --git a/Doc/lib/libundoc.tex b/Doc/lib/libundoc.tex
index 3cd5d91..ae94a97 100644
--- a/Doc/lib/libundoc.tex
+++ b/Doc/lib/libundoc.tex
@@ -103,6 +103,9 @@
 \item[bdb.py]
 --- A generic Python debugger base class (used by pdb)
 
+\item[wdb.py]
+--- A primitive windowing debugger based on STDWIN.
+
 \item[ihooks.py]
 --- Import hook support (for rexec)