diff --git a/.gitignore b/.gitignore
index 70b9b5c..7746dd9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,7 @@ missing
 libtool
 install-sh
 ltmain.sh
+aclocal.m4
 
 apps/d_mos*.h
 apps/d_mos*.cc