diff --git a/.gitignore b/.gitignore
index 0f6b3e6..a55fffc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,3 +30,4 @@
 /llvm-3.8.1.src.tar.xz
 /llvm-3.9.0.src.tar.xz
 /llvm-3.9.1.src.tar.xz
+/llvm-4.0.0.src.tar.xz