diff --git a/src/proto/if_mzsch.pro b/src/proto/if_mzsch.pro
new file mode 100644
index 0000000..4ef1f51
--- /dev/null
+++ b/src/proto/if_mzsch.pro
@@ -0,0 +1,19 @@
+/* if_mzsch.c */
+int mzscheme_enabled __ARGS((int verbose));
+void mzscheme_end __ARGS((void));
+void ex_mzscheme __ARGS((exarg_T *eap));
+void ex_mzfile __ARGS((exarg_T *eap));
+void mzscheme_buffer_free __ARGS((buf_T *buf));
+void mzscheme_window_free __ARGS((win_T *win));
+char *mzscheme_version __ARGS((void));
+void raise_vim_exn(const char *add_info);
+void raise_if_error __ARGS((void));
+buf_T *get_valid_buffer __ARGS((void *));
+win_T *get_valid_window __ARGS((void *));
+void mzvim_check_threads __ARGS((void));
+void mzvim_reset_timer __ARGS((void));
+void *mzvim_eval_string __ARGS((char_u *str));
+struct Scheme_Object *mzvim_apply __ARGS((struct Scheme_Object *, int argc,
+    struct Scheme_Object **));
+int mzthreads_allowed (void);
+/* vim: set ft=c : */