diff --git a/src/proto.h b/src/proto.h
index 490f969..c81212c 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -20,7 +20,7 @@
  * Machine-dependent routines.
  */
 /* avoid errors in function prototypes */
-# if !defined(FEAT_X11) && !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_KDE)
+# if !defined(FEAT_X11) && !defined(FEAT_GUI_GTK)
 #  define Display int
 #  define Widget int
 # endif
@@ -62,9 +62,6 @@
 # ifdef __BEOS__
 #  include "os_beos.pro"
 # endif
-# ifdef MACOS
-#  include "os_mac.pro"
-# endif
 # ifdef RISCOS
 #  include "os_riscos.pro"
 # endif
@@ -198,10 +195,6 @@
 #  ifdef FEAT_GUI_W32
 #   include "gui_w32.pro"
 #  endif
-#  ifdef FEAT_GUI_KDE
-#   include "gui_kde.pro"
-#   include "gui_kde_x11.pro"
-#  endif
 #  ifdef FEAT_GUI_GTK
 #   include "gui_gtk.pro"
 #   include "gui_gtk_x11.pro"