diff --git a/src/proto/evalfunc.pro b/src/proto/evalfunc.pro
index 78998ff..a720b64 100644
--- a/src/proto/evalfunc.pro
+++ b/src/proto/evalfunc.pro
@@ -10,9 +10,9 @@
 type_T *internal_func_ret_type(int idx, int argcount, type2_T *argtypes, type_T **decl_type, garray_T *type_gap);
 int internal_func_is_map(int idx);
 int check_internal_func(int idx, int argcount);
-int call_internal_func(char_u *name, int argcount, typval_T *argvars, typval_T *rettv);
+funcerror_T call_internal_func(char_u *name, int argcount, typval_T *argvars, typval_T *rettv);
 void call_internal_func_by_idx(int idx, typval_T *argvars, typval_T *rettv);
-int call_internal_method(char_u *name, int argcount, typval_T *argvars, typval_T *rettv, typval_T *basetv);
+funcerror_T call_internal_method(char_u *name, int argcount, typval_T *argvars, typval_T *rettv, typval_T *basetv);
 int non_zero_arg(typval_T *argvars);
 buf_T *get_buf_arg(typval_T *arg);
 win_T *get_optional_window(typval_T *argvars, int idx);