diff --git a/meson.build b/meson.build
index 32d72045b..47385ab03 100644
--- a/meson.build
+++ b/meson.build
@@ -455,6 +455,7 @@ inc = include_directories(
     'randr',
     'render',
     'xfixes',
+    xproto_dep.get_pkgconfig_variable('includedir')
 )
 
 glx_inc = include_directories('glx')