Index: meson.build
--- meson.build.orig
+++ meson.build
@@ -453,7 +453,7 @@ else
       cc.has_header('sys/event.h', args: compile_args_c) and
       cc.has_function(
           'kqueue',
-          prefix: '#include <sys/event.h>',
+          prefix: '#include <sys/types.h>\n#include <sys/event.h>',
           args: compile_args_c,
       )
     )
