diff --git a/udev_monitor.c b/udev_monitor.c
index 820d6a3..d533a48 100644
--- a/udev_monitor.c
+++ b/udev_monitor.c
@@ -32,8 +32,8 @@ struct udev_monitor {
     struct udev_list_entry subsystem_match;
     struct udev_list_entry devtype_match;
     struct udev *udev;
+    unsigned nlgrp;
     int refcount;
-    int nlgrp;
     int fd;
 };