diff --git a/.gitattributes b/.gitattributes
index 6cf47bc9ad..2983afbfc3 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -9,3 +9,4 @@ lib/libc/** linguist-vendored
 lib/libcxx/** linguist-vendored
 lib/libcxxabi/** linguist-vendored
 lib/libunwind/** linguist-vendored
+lib/tsan/** linguist-vendored