diff --git a/src/proto/if_mzsch.pro b/src/proto/if_mzsch.pro
index 4ef1f51..522ac94 100644
--- a/src/proto/if_mzsch.pro
+++ b/src/proto/if_mzsch.pro
@@ -16,4 +16,9 @@
 struct Scheme_Object *mzvim_apply __ARGS((struct Scheme_Object *, int argc,
     struct Scheme_Object **));
 int mzthreads_allowed (void);
+#ifdef FEAT_GUI_KDE
+void timer_proc (void);
+void mzscheme_kde_start_timer (void);
+void mzscheme_kde_stop_timer (void);
+#endif
 /* vim: set ft=c : */