diff --git a/.gitignore b/.gitignore
index e62d4da..9ca9050 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,7 @@
 Doxyfile.core
 Doxyfile.ctrl
 Doxyfile.gsm
+Doxyfile.isdn
 Doxyfile.vty
 Doxyfile.codec
 Doxyfile.coding
@@ -80,6 +81,7 @@
 doc/vty/html
 doc/vty/doxygen_sqlite3.db
 doc/gsm
+doc/isdn
 doc/gb
 doc/html.tar
 doc/*.tag