diff --git a/.gitignore b/.gitignore
index acef16825ced37ad0b04205fac906e372bdba4dd..44761d9947bd5efa692f29dfdb44216699f3fd27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,4 +15,5 @@ Makefile
 /*.c
 /*.lus
 /*.lusic
-_opam
\ No newline at end of file
+_opam
+*_build
\ No newline at end of file