diff --git a/modules/lang/rust/autoload.el b/modules/lang/rust/autoload.el
index 2b94b95de..71f98665e 100644
--- a/modules/lang/rust/autoload.el
+++ b/modules/lang/rust/autoload.el
@@ -5,4 +5,4 @@
 ;;;###autoload
 (defun +rust-cargo-project-p ()
   "Return t if this is a cargo project."
-  (doom-project-has! "Cargo.toml"))
+  (locate-dominating-file buffer-file-name "Cargo.toml"))