diff -Nur meson-0.41.0/mesonbuild/compilers.py new/mesonbuild/compilers.py
--- meson-0.41.0/mesonbuild/compilers.py	2017-06-12 20:30:20.000000000 +0200
+++ new/mesonbuild/compilers.py	2017-06-19 13:43:25.771564616 +0200
@@ -2621,9 +2621,13 @@
                           '3': default_warn_args + ['-Wextra', '-Wpedantic']}
 
     def get_options(self):
+        c_stds = ['c++03', 'c++11']
+        g_stds = ['gnu++03', 'gnu++11']
+        if mesonlib.version_compare(self.version, '>=5.0.0'):
+            c_stds += ['c++14', 'c++1z']
+            g_stds += ['gnu++14', 'gnu++1z']
         opts = {'cpp_std': coredata.UserComboOption('cpp_std', 'C++ language standard to use',
-                                                    ['none', 'c++03', 'c++11', 'c++14', 'c++1z',
-                                                     'gnu++03', 'gnu++11', 'gnu++14', 'gnu++1z'],
+                                                    ['none'] + c_stds + g_stds,
                                                     'none'),
                 'cpp_debugstl': coredata.UserBooleanOption('cpp_debugstl',
                                                            'STL debug mode',