diff --git a/compiler/rustc_middle/src/middle/dependency_format.rs b/compiler/rustc_middle/src/middle/dependency_format.rs
index e7d0cffc85cfb..a3aff9a110130 100644
--- a/compiler/rustc_middle/src/middle/dependency_format.rs
+++ b/compiler/rustc_middle/src/middle/dependency_format.rs
@@ -4,15 +4,15 @@
 //! For all the gory details, see the provider of the `dependency_formats`
 //! query.
 
+// FIXME: move this file to rustc_metadata::dependency_format, but
+// this will introduce circular dependency between rustc_metadata and rustc_middle
+
 use rustc_macros::{Decodable, Encodable, HashStable};
 use rustc_session::config::CrateType;
 
 /// A list of dependencies for a certain crate type.
 ///
 /// The length of this vector is the same as the number of external crates used.
-/// The value is None if the crate does not need to be linked (it was found
-/// statically in another dylib), or Some(kind) if it needs to be linked as
-/// `kind` (either static or dynamic).
 pub type DependencyList = Vec<Linkage>;
 
 /// A mapping of all required dependencies for a particular flavor of output.