diff --git a/src/proto/vim9execute.pro b/src/proto/vim9execute.pro
new file mode 100644
index 0000000..4f7262d
--- /dev/null
+++ b/src/proto/vim9execute.pro
@@ -0,0 +1,6 @@
+/* vim9execute.c */
+int call_def_function(ufunc_T *ufunc, int argc, typval_T *argv, typval_T *rettv);
+void ex_disassemble(exarg_T *eap);
+int tv2bool(typval_T *tv);
+int check_not_string(typval_T *tv);
+/* vim: set ft=c : */