diff --git a/Doc/Makefile.deps b/Doc/Makefile.deps
index 3870713..e968cd7 100644
--- a/Doc/Makefile.deps
+++ b/Doc/Makefile.deps
@@ -198,6 +198,7 @@
 	../lib/libmutex.tex \
 	../lib/libnis.tex \
 	../lib/libpipes.tex \
+	../lib/libpty.tex \
 	../lib/librlcompleter.tex \
 	../lib/libsched.tex \
 	../lib/libstatvfs.tex \
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index 15535ac..69bc730 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -172,6 +172,7 @@
 \input{libgdbm}
 \input{libtermios}
 \input{libtty}
+\input{libpty}
 \input{libfcntl}
 \input{libpipes}
 \input{libposixfile}