diff --git a/src/structs.h b/src/structs.h
index 581b22e..be08f0a 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -2052,13 +2052,13 @@
 
 // Struct passed between functions dealing with function call execution.
 //
-// "argv_func", when not NULL, can be used to fill in arguments only when the
+// "fe_argv_func", when not NULL, can be used to fill in arguments only when the
 // invoked function uses them.  It is called like this:
-//   new_argcount = argv_func(current_argcount, argv, partial_argcount,
-//							called_func_argcount)
+//   new_argcount = fe_argv_func(current_argcount, argv, partial_argcount,
+//							called_func)
 //
 typedef struct {
-    int		(* fe_argv_func)(int, typval_T *, int, int);
+    int		(* fe_argv_func)(int, typval_T *, int, ufunc_T *);
     linenr_T	fe_firstline;	// first line of range
     linenr_T	fe_lastline;	// last line of range
     int		*fe_doesrange;	// if not NULL: return: function handled range