diff --git a/src/bootstrap/src/core/builder/mod.rs b/src/bootstrap/src/core/builder/mod.rs
index 25fa10e08111..9c04f097bee2 100644
--- a/src/bootstrap/src/core/builder/mod.rs
+++ b/src/bootstrap/src/core/builder/mod.rs
@@ -1262,6 +1262,9 @@ impl<'a> Builder<'a> {
             ),
         ),
     )]
+
+    /// FIXME: This function is unnecessary (and dangerous, see <https://github.com/rust-lang/rust/issues/137469>).
+    /// We already have uplifting logic for the compiler, so remove this.
     pub fn compiler_for(
         &self,
         stage: u32,