diff --git a/stl/inc/mdspan b/stl/inc/mdspan
index d956cb23431..0cc5d80650c 100644
--- a/stl/inc/mdspan
+++ b/stl/inc/mdspan
@@ -1075,6 +1075,8 @@ struct _Mdspan_mapping_base {
 
     constexpr explicit _Mdspan_mapping_base(const _Extents& _Exts) : _Map(_Exts) {}
 
+    constexpr explicit _Mdspan_mapping_base(_Extents&& _Exts) : _Map(_STD move(_Exts)) {}
+
     template <class _OtherMapping>
     constexpr explicit _Mdspan_mapping_base(const _OtherMapping& _Map_) : _Map(_Map_) {}
 
@@ -1091,6 +1093,8 @@ struct _Mdspan_mapping_base<_Extents, _LayoutPolicy> {
 
     constexpr explicit _Mdspan_mapping_base(const _Extents&) noexcept {}
 
+    constexpr explicit _Mdspan_mapping_base(_Extents&&) noexcept {}
+
     template <class _OtherMapping>
     constexpr explicit _Mdspan_mapping_base(const _OtherMapping& _Map_) {
         // NB: Constructing _Mapping from _OtherMapping may have side effects - we should create a temporary.