diff --git a/Subtrees/beast/modules/beast_boost/.gitignore b/Subtrees/beast/modules/beast_boost/.gitignore
new file mode 100644
index 0000000000..4d99b61908
--- /dev/null
+++ b/Subtrees/beast/modules/beast_boost/.gitignore
@@ -0,0 +1,2 @@
+/boost-subtree
+*.cpp