diff --git a/HISTORY b/HISTORY
index 64319e5..e853896 100755
--- a/HISTORY
+++ b/HISTORY
@@ -1,3 +1,6 @@
+Feb. 16 2017
+Improved meta function
+
 Feb. 14 2017
 Fixed a wrong routing unreferencing bug
 
diff --git a/core/my_basic.c b/core/my_basic.c
index 0aea616..e1a7b00 100755
--- a/core/my_basic.c
+++ b/core/my_basic.c
@@ -4538,9 +4538,9 @@ static mb_meta_status_u _try_overridden(mb_interpreter_t* s, void** l, mb_value_
 		_MAKE_NIL(&obj);
 		_public_value_to_internal_object(d, &obj);
 		if(t == MB_MF_COLL && obj.data.usertype_ref->coll_func)
-			return obj.data.usertype_ref->coll_func(s, l, f);
+			return obj.data.usertype_ref->coll_func(s, l, d, f);
 		else if(t == MB_MF_FUNC && obj.data.usertype_ref->generic_func)
-			return obj.data.usertype_ref->generic_func(s, l, f);
+			return obj.data.usertype_ref->generic_func(s, l, d, f);
 	}
 #endif /* MB_ENABLE_USERTYPE_REF */
 #ifdef MB_ENABLE_CLASS
diff --git a/core/my_basic.h b/core/my_basic.h
index 9f91c62..40c7e9b 100755
--- a/core/my_basic.h
+++ b/core/my_basic.h
@@ -552,7 +552,7 @@ typedef unsigned (* mb_hash_func_t)(struct mb_interpreter_t*, void*);
 typedef int (* mb_cmp_func_t)(struct mb_interpreter_t*, void*, void*);
 typedef int (* mb_fmt_func_t)(struct mb_interpreter_t*, void*, char*, unsigned);
 typedef int (* mb_meta_operator_t)(struct mb_interpreter_t*, void**, mb_value_t*, mb_value_t*, mb_value_t*);
-typedef mb_meta_status_u (* mb_meta_func_t)(struct mb_interpreter_t*, void**, const char*);
+typedef mb_meta_status_u (* mb_meta_func_t)(struct mb_interpreter_t*, void**, mb_value_t*, const char*);
 typedef char* (* mb_memory_allocate_func_t)(unsigned);
 typedef void (* mb_memory_free_func_t)(char*);