diff --git a/Unity.gitignore b/Unity.gitignore
index 2ed4ccca2cbcbc4da38cc4669795ed123dab3988..4d8768d63b92e55cf61944fb882980cf6028202e 100644
--- a/Unity.gitignore
+++ b/Unity.gitignore
@@ -10,3 +10,4 @@
 /*.user
 /*.userprefs
 /*.pidb
+/*.booproj