diff --git a/src/vim.h b/src/vim.h
index 1f4f17b..a51834f 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -121,6 +121,7 @@
     || defined(FEAT_GUI_W32) \
     || defined(FEAT_GUI_W16) \
     || defined(FEAT_GUI_PHOTON)
+# define FEAT_GUI_ENABLED  /* also defined with NO_X11_INCLUDES */
 # if !defined(FEAT_GUI) && !defined(NO_X11_INCLUDES)
 #  define FEAT_GUI
 # endif