diff --git a/src/librustc/mir/interpret/error.rs b/src/librustc/mir/interpret/error.rs
index ab3fb0d2180a..dca1c12b51df 100644
--- a/src/librustc/mir/interpret/error.rs
+++ b/src/librustc/mir/interpret/error.rs
@@ -24,6 +24,12 @@ use syntax::ast;
 
 pub type ConstEvalResult<'tcx> = Result<&'tcx ty::Const<'tcx>, Lrc<ConstEvalErr<'tcx>>>;
 
+#[derive(Copy, Clone, Debug, Hash, RustcEncodable, RustcDecodable, Eq, PartialEq, Ord, PartialOrd)]
+pub enum ConstVal<'tcx> {
+    Unevaluated(DefId, &'tcx Substs<'tcx>),
+    Value(ConstValue<'tcx>),
+}
+
 #[derive(Clone, Debug, RustcEncodable, RustcDecodable)]
 pub struct ConstEvalErr<'tcx> {
     pub span: Span,
diff --git a/src/librustc/mir/interpret/value.rs b/src/librustc/mir/interpret/value.rs
index b17b77410176..9e3d4e60603e 100644
--- a/src/librustc/mir/interpret/value.rs
+++ b/src/librustc/mir/interpret/value.rs
@@ -5,18 +5,10 @@ use ty;
 
 use super::{EvalResult, Pointer, PointerArithmetic, Allocation};
 
-#[derive(Copy, Clone, Debug, Hash, RustcEncodable, RustcDecodable, Eq, PartialEq, Ord, PartialOrd)]
-pub enum ConstVal<'tcx> {
-    Value(ConstValue<'tcx>),
-}
-
 /// Represents a constant value in Rust. ByVal and ScalarPair are optimizations which
 /// matches Value's optimizations for easy conversions between these two types
 #[derive(Clone, Copy, Debug, Eq, PartialEq, PartialOrd, Ord, RustcEncodable, RustcDecodable, Hash)]
 pub enum ConstValue<'tcx> {
-    /// Never returned from the `const_eval` query, but the HIR contains these frequently in order
-    /// to allow HIR creation to happen for everything before needing 
-    Unevaluated(DefId, &'tcx Substs<'tcx>),
     /// Used only for types with layout::abi::Scalar ABI and ZSTs which use Scalar::undef()
     Scalar(Scalar),
     /// Used only for types with layout::abi::ScalarPair