diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs
index 26b4735d926a..2fdcb2681db0 100644
--- a/src/librustc/ty/mod.rs
+++ b/src/librustc/ty/mod.rs
@@ -2946,16 +2946,6 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         }
     }
 
-    /// Given the DefId of an item, returns its MIR, borrowed immutably.
-    /// Returns None if there is no MIR for the DefId
-    pub fn maybe_optimized_mir(self, did: DefId) -> Option<&'gcx Mir<'gcx>> {
-        if self.is_mir_available(did) {
-            Some(self.optimized_mir(did))
-        } else {
-            None
-        }
-    }
-
     /// Get the attributes of a definition.
     pub fn get_attrs(self, did: DefId) -> Attributes<'gcx> {
         if let Some(id) = self.hir().as_local_node_id(did) {
diff --git a/src/librustc_mir/interpret/eval_context.rs b/src/librustc_mir/interpret/eval_context.rs
index 19362b6cfdb1..90f7ba761ea1 100644
--- a/src/librustc_mir/interpret/eval_context.rs
+++ b/src/librustc_mir/interpret/eval_context.rs
@@ -265,11 +265,11 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
         }
         trace!("load mir {:?}", instance);
         match instance {
-            ty::InstanceDef::Item(def_id) => {
-                self.tcx.maybe_optimized_mir(def_id).ok_or_else(||
-                    EvalErrorKind::NoMirFor(self.tcx.item_path_str(def_id)).into()
-                )
-            }
+            ty::InstanceDef::Item(def_id) => if self.tcx.is_mir_available(did) {
+                Ok(self.tcx.optimized_mir(did))
+            } else {
+                err!(NoMirFor(self.tcx.item_path_str(def_id)))
+            },
             _ => Ok(self.tcx.instance_mir(instance)),
         }
     }