diff --git a/stl/inc/string b/stl/inc/string
index 955674685eb..e298a1b771d 100644
--- a/stl/inc/string
+++ b/stl/inc/string
@@ -63,7 +63,7 @@ basic_istream<_Elem, _Traits>& getline(basic_istream<_Elem, _Traits>&& _Istr,
     }
 
     _Istr.setstate(_State);
-    return _Istr;
+    return static_cast<basic_istream<_Elem, _Traits>&>(_Istr);
 }
 
 template <class _Elem, class _Traits, class _Alloc>
diff --git a/stl/inc/xstring b/stl/inc/xstring
index 36cef22456a..73d36b05bfb 100644
--- a/stl/inc/xstring
+++ b/stl/inc/xstring
@@ -4968,7 +4968,7 @@ basic_istream<_Elem, _Traits>& operator>>(
     }
 
     _Istr.setstate(_State);
-    return _Istr;
+    return static_cast<basic_istream<_Elem, _Traits>&>(_Istr);
 }
 
 template <class _Elem, class _Traits, class _Alloc>