diff --git a/src/backends/native/meta-idle-monitor-native.c b/src/backends/native/meta-idle-monitor-native.c
index 8eb357615..13d8d516f 100644
--- a/src/backends/native/meta-idle-monitor-native.c
+++ b/src/backends/native/meta-idle-monitor-native.c
@@ -125,7 +125,6 @@ meta_idle_monitor_native_make_watch (MetaIdleMonitor           *monitor,
   watch_native = g_slice_new0 (MetaIdleMonitorWatchNative);
   watch = (MetaIdleMonitorWatch *) watch_native;
 
-  watch = g_slice_new0 (MetaIdleMonitorWatch);
   watch->monitor = monitor;
   watch->id = get_next_watch_serial ();
   watch->callback = callback;