diff --git a/src/backends/native/meta-monitor-manager-native.c b/src/backends/native/meta-monitor-manager-native.c
index 92d687708..a0e36a4b9 100644
--- a/src/backends/native/meta-monitor-manager-native.c
+++ b/src/backends/native/meta-monitor-manager-native.c
@@ -90,8 +90,6 @@ struct _MetaMonitorManagerNativeClass
   MetaMonitorManagerClass parent_class;
 };
 
-#define VIRTUAL_OUTPUT_ID_BIT (((uint64_t) 1) << 63)
-
 static void
 initable_iface_init (GInitableIface *initable_iface);
 
diff --git a/src/backends/native/meta-virtual-monitor-native.c b/src/backends/native/meta-virtual-monitor-native.c
index 0976f86ca..5f698c79a 100644
--- a/src/backends/native/meta-virtual-monitor-native.c
+++ b/src/backends/native/meta-virtual-monitor-native.c
@@ -33,8 +33,6 @@ struct _MetaVirtualMonitorNative
   uint64_t id;
 };
 
-#define VIRTUAL_OUTPUT_ID_BIT (((uint64_t) 1) << 63)
-
 G_DEFINE_TYPE (MetaVirtualMonitorNative, meta_virtual_monitor_native,
                META_TYPE_VIRTUAL_MONITOR)