diff --git a/meson.build b/meson.build
index 74ee36a3..cecb0606 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,12 @@
-project('libglnx', 'c')
+project(
+  'libglnx',
+  'c',
+  default_options : [
+    'c_std=gnu99',
+  ],
+)
 
 add_project_arguments('-D_GNU_SOURCE', language: 'c')
-add_project_arguments('-std=gnu99', language: 'c')
 add_project_arguments('-Wno-unused-local-typedefs', language: 'c')
 
 cc = meson.get_compiler('c')