diff --git a/.gitignore b/.gitignore
index b56d3ffb..64b08bde 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+aclocal.m4
 autom4te.cache
 configure
 Makefile.in
@@ -29,8 +30,14 @@ libtiff/mkg3states
 libtiff/stamp-h1
 libtiff/stamp-h2
 libtiff/tif_config.h
+libtiff/tif_config.h.in
 libtiff/tiffconf.h
 libtool
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
 tools/fax2ps
 tools/fax2tiff
 tools/pal2rgb