diff --git a/meson.build b/meson.build
index 35d07552..39244f80 100644
--- a/meson.build
+++ b/meson.build
@@ -171,10 +171,14 @@ dep_rt = cc.find_library('rt', required : false)
 dep_lua = dependency(get_option('lua-interpreter'),
 		     required : get_option('lua-plugins'))
 have_lua = dep_lua.found()
-config_h.set10('HAVE_LUA', have_lua)
+if have_lua
+	config_h.set('HAVE_LUA', 1)
+endif
 
 have_plugins =  dep_lua.found()
-config_h.set10('HAVE_PLUGINS', have_plugins)
+if have_plugins
+	config_h.set('HAVE_PLUGINS', 1)
+endif
 
 summary({
 	'Plugins enabled' : have_plugins,
diff --git a/src/libinput-plugin.c b/src/libinput-plugin.c
index 81c45fe9..bee11732 100644
--- a/src/libinput-plugin.c
+++ b/src/libinput-plugin.c
@@ -382,7 +382,7 @@ libinput_plugin_system_load_plugins(struct libinput *libinput,
 		return 0;
 	}
 
-#if HAVE_LUA
+#ifdef HAVE_LUA
 	_autostrvfree_ char **directories = steal(&libinput->plugin_system.directories);
 	size_t nfiles = 0;
 	_autostrvfree_ char **plugin_files =
@@ -400,10 +400,10 @@ libinput_plugin_system_load_plugins(struct libinput *libinput,
 
 	libinput_plugin_system_run(&libinput->plugin_system);
 
-#if !HAVE_PLUGINS
-	return -ENOSYS;
-#else
+#ifdef HAVE_PLUGINS
 	return 0;
+#else
+	return -ENOSYS;
 #endif
 }