diff --git a/.hgignore b/.hgignore
index 6f9f003d..af20adde 100644
--- a/.hgignore
+++ b/.hgignore
@@ -70,6 +70,11 @@ lib/libethercat.la
 libtool
 m4/Makefile
 m4/Makefile.in
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
 modules.order
 script/Makefile
 script/Makefile.in