diff --git a/ffbuild/.gitignore b/ffbuild/.gitignore
index adaf399e9f..5f9097a221 100644
--- a/ffbuild/.gitignore
+++ b/ffbuild/.gitignore
@@ -5,3 +5,4 @@
 /config.log
 /config.mak
 /config.sh
+/config.out