diff --git a/src/librustc/middle/trans/common.rs b/src/librustc/middle/trans/common.rs
index bbed6324543..b1b7441f243 100644
--- a/src/librustc/middle/trans/common.rs
+++ b/src/librustc/middle/trans/common.rs
@@ -75,6 +75,9 @@ pub fn type_is_immediate(ccx: &mut CrateContext, ty: ty::t) -> bool {
     }
     match ty::get(ty).sty {
         // FIXME: #9651: small `ty_struct` should also be immediate
+        ty::ty_struct(def_id, ref substs) => {
+            ty::struct_fields(tcx, def_id, substs).is_empty()
+        }
         ty::ty_enum(*) | ty::ty_tup(*) => {
             let llty = sizing_type_of(ccx, ty);
             llsize_of_alloc(ccx, llty) <= llsize_of_alloc(ccx, ccx.int_type)