diff --git a/src/base/config.hpp b/src/base/config.hpp
index ffe9343..16ded3e 100644
--- a/src/base/config.hpp
+++ b/src/base/config.hpp
@@ -19,7 +19,16 @@ struct QOverload
 		return( pmf );
 	}
 };
-#endif
-#endif
+
+// this adds const to non-const objects (like std::as_const)
+template < typename T >
+Q_DECL_CONSTEXPR typename std::add_const< T >::type& qAsConst( T& t ) noexcept { return( t ); }
+// prevent rvalue arguments:
+template < typename T >
+void qAsConst( const T&& ) = delete;
+
+
+#endif // if QT_VERSION <= 0x050700
+#endif // if ( defined ( TARGET_LSB_ID_AstraLinuxSE ) && defined ( TARGET_LSB_CODENAME_smolensk ) )
 
 #endif // MYX_BASE_CONFIG_HPP_