diff --git a/src/comp/middle/trans.rs b/src/comp/middle/trans.rs
index 53f8b0b0d3472..850fa50a25cb1 100644
--- a/src/comp/middle/trans.rs
+++ b/src/comp/middle/trans.rs
@@ -6534,7 +6534,8 @@ fn trans_closure(bcx_maybe: &option::t[@block_ctxt],
         // (trans_block, trans_expr, et cetera).
         let rslt =
             if !ty::type_is_nil(cx.ccx.tcx, block_ty) &&
-                   !ty::type_is_bot(cx.ccx.tcx, block_ty) {
+               !ty::type_is_bot(cx.ccx.tcx, block_ty) &&
+               f.proto != ast::proto_iter {
                 trans_block(bcx, f.body, save_in(fcx.llretptr))
             } else { trans_block(bcx, f.body, return) };
         bcx = rslt.bcx;