diff --git a/Autotools.gitignore b/Autotools.gitignore
index e3923f96..ffa6ecc3 100644
--- a/Autotools.gitignore
+++ b/Autotools.gitignore
@@ -31,3 +31,12 @@ Makefile.in
 # http://www.gnu.org/software/texinfo
 
 /texinfo.tex
+
+# http://www.gnu.org/software/m4/
+
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
+autom4te.cache