diff --git a/meson.build b/meson.build
index 345fa18..6171148 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('libei', 'c',
   version: '1.0.0',
   license: 'MIT',
-  default_options: [ 'c_std=gnu99', 'warning_level=2' ],
+  default_options: [ 'c_std=gnu11', 'warning_level=2' ],
   meson_version: '>= 0.56.0')
 
 libei_version = meson.project_version().split('.')