diff --git a/gdk/quartz/gdkquartz.h b/gdk/quartz/gdkquartz.h
index 24555d4a40..ed8e4cb8b1 100644
--- a/gdk/quartz/gdkquartz.h
+++ b/gdk/quartz/gdkquartz.h
@@ -53,7 +53,9 @@ typedef enum
   GDK_OSX_YOSEMITE = 10,
   GDK_OSX_EL_CAPITAN = 11,
   GDK_OSX_SIERRA = 12,
-  GDK_OSX_CURRENT = 12,
+  GDK_OSX_HIGH_SIERRA = 13,
+  GDK_OSX_MOJAVE = 14,
+  GDK_OSX_CURRENT = 14,
   GDK_OSX_NEW = 99
 } GdkOSXVersion;