diff --git a/src/librustc_mir/interpret/intrinsics.rs b/src/librustc_mir/interpret/intrinsics.rs
index eb7657f780c5..da7cff97ee2c 100644
--- a/src/librustc_mir/interpret/intrinsics.rs
+++ b/src/librustc_mir/interpret/intrinsics.rs
@@ -5,7 +5,7 @@
 use rustc::hir::def_id::DefId;
 use rustc::mir::{
     self,
-    interpret::{ConstValue, InterpResult, Scalar},
+    interpret::{ConstValue, GlobalId, InterpResult, Scalar},
     BinOp,
 };
 use rustc::ty;
diff --git a/src/librustc_mir/interpret/operand.rs b/src/librustc_mir/interpret/operand.rs
index e37aa69dfde8..def979b63b52 100644
--- a/src/librustc_mir/interpret/operand.rs
+++ b/src/librustc_mir/interpret/operand.rs
@@ -588,6 +588,11 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 // `StaticKind` once and for all.
                 return self.const_eval(GlobalId { instance, promoted: None });
             }
+            ty::ConstKind::Infer(..)
+            | ty::ConstKind::Bound(..)
+            | ty::ConstKind::Placeholder(..) => {
+                bug!("eval_const_to_op: Unexpected ConstKind {:?}", val)
+            }
             ty::ConstKind::Value(val_val) => val_val,
         };
         // Other cases need layout.