diff --git a/meson.build b/meson.build
index bd76c8a..936b0c1 100644
--- a/meson.build
+++ b/meson.build
@@ -176,7 +176,7 @@ if build_quadruple
 
   gen_quadruple = generator(fc_compiler,
                             output : 'quadruple_@BASENAME@.f90',
-                            arguments : pp_options + '-DREAL_128' +
+                            arguments : pp_options + '-DREAL_128' + '-DCUTEST_16btye_reals_exist' +
                                         ['-I', '@CURRENT_SOURCE_DIR@/include', '@INPUT@'] +
                                         output_generator)