diff --git a/mps/.gitignore b/mps/.gitignore
index 311153ef7d6..8f7c5d938a1 100644
--- a/mps/.gitignore
+++ b/mps/.gitignore
@@ -11,6 +11,7 @@
 # Autoconf and Automake output
 Makefile
 autom4te.cache
+aclocal.m4
 config.log
 config.status
 .deps