diff --git a/src/librustc_mir/monomorphize/collector.rs b/src/librustc_mir/monomorphize/collector.rs
index 056c6989abac..afd895eb7ca0 100644
--- a/src/librustc_mir/monomorphize/collector.rs
+++ b/src/librustc_mir/monomorphize/collector.rs
@@ -1032,7 +1032,7 @@ impl<'b, 'a, 'v> RootCollector<'b, 'a, 'v> {
         // late-bound regions, since late-bound
         // regions must appear in the argument
         // listing.
-        let main_ret_ty = self.tcx.no_late_bound_regions(&main_ret_ty).unwrap();
+        let main_ret_ty = main_ret_ty.no_late_bound_regions().unwrap();
 
         let start_instance = Instance::resolve(
             self.tcx,
diff --git a/src/librustc_trans/base.rs b/src/librustc_trans/base.rs
index b2d516e78688..3955171f9398 100644
--- a/src/librustc_trans/base.rs
+++ b/src/librustc_trans/base.rs
@@ -563,7 +563,7 @@ fn maybe_create_entry_wrapper(ccx: &CrateContext) {
         // late-bound regions, since late-bound
         // regions must appear in the argument
         // listing.
-        let main_ret_ty = ccx.tcx().no_late_bound_regions(&main_ret_ty).unwrap();
+        let main_ret_ty = main_ret_ty.no_late_bound_regions().unwrap();
 
         if declare::get_defined_value(ccx, "main").is_some() {
             // FIXME: We should be smart and show a better diagnostic here.