diff --git a/meson.build b/meson.build
index ee12798f..b66351e4 100644
--- a/meson.build
+++ b/meson.build
@@ -210,6 +210,13 @@ util_files = files(
   'src/mesa/util/os_socket.c',
   'src/mesa/util/os_time.c',
 )
+pre_args += '-DMANGOHUD_ARCH='
+if target_machine.cpu_family() == 'x86_64'
+  pre_args += '-DMANGOHUD_ARCH="64bit"'
+endif
+if target_machine.cpu_family() == 'x86'
+  pre_args += '-DMANGOHUD_ARCH="32bit"'
+endif
 
 subdir('modules/ImGui')
 subdir('src')