diff --git a/Doc/lib/libundoc.tex b/Doc/lib/libundoc.tex
index fcb2c05aab0..983ea70ca66 100644
--- a/Doc/lib/libundoc.tex
+++ b/Doc/lib/libundoc.tex
@@ -202,3 +202,9 @@ clmodule.c -- Interface to the SGI compression library.
 
 svmodule.c -- Interface to the ``simple video'' board on SGI Indigo
 (obsolete hardware).
+
+The following is Windows specific:
+
+msvcrtmodule.c (in directory PC) -- define a number of Windows
+specific goodies like \code{khbit()}, \code{getch()} and
+\code{setmode()}.  (Windows 95 and NT only.)
diff --git a/Doc/libundoc.tex b/Doc/libundoc.tex
index fcb2c05aab0..983ea70ca66 100644
--- a/Doc/libundoc.tex
+++ b/Doc/libundoc.tex
@@ -202,3 +202,9 @@ clmodule.c -- Interface to the SGI compression library.
 
 svmodule.c -- Interface to the ``simple video'' board on SGI Indigo
 (obsolete hardware).
+
+The following is Windows specific:
+
+msvcrtmodule.c (in directory PC) -- define a number of Windows
+specific goodies like \code{khbit()}, \code{getch()} and
+\code{setmode()}.  (Windows 95 and NT only.)