diff --git a/.cvsignore b/.cvsignore
index 91e815725f..4d4272428d 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -4,6 +4,7 @@ Makefile
 libtool
 Makefile.in
 aclocal.m4
+aclocal.m4.bak
 configure
 config.h
 config.status