diff --git a/library/compiler-builtins/josh-sync.toml b/library/compiler-builtins/josh-sync.toml
new file mode 100644
index 000000000000..599a12af8e5d
--- /dev/null
+++ b/library/compiler-builtins/josh-sync.toml
@@ -0,0 +1,3 @@
+org = "rust-lang"
+repo = "compiler-builtins"
+path = "library/compiler-builtins"