diff --git a/flang/include/flang/Evaluate/constant.h b/flang/include/flang/Evaluate/constant.h
--- a/flang/include/flang/Evaluate/constant.h
+++ b/flang/include/flang/Evaluate/constant.h
@@ -97,9 +97,9 @@
 
   template <typename A>
   ConstantBase(const A &x, Result res = Result{}) : result_{res}, values_{x} {}
-  template <typename A, typename = common::NoLvalue<A>>
-  ConstantBase(A &&x, Result res = Result{})
-      : result_{res}, values_{std::move(x)} {}
+  ConstantBase(ELEMENT &&x, Result res = Result{}) : result_{res} {
+    values_.push_back(std::move(x));
+  }
   ConstantBase(
       std::vector<Element> &&, ConstantSubscripts &&, Result = Result{});