diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index 3b35ca1d15d..ab7f7350d5f 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -976,6 +976,7 @@ impl Step for PlainSourceTarball {
             "config.example.toml",
             "Cargo.toml",
             "Cargo.lock",
+            ".gitmodules",
         ];
         let src_dirs = ["src", "compiler", "library", "tests"];