diff --git a/core/my_basic.c b/core/my_basic.c
index 442f285..8ba8163 100755
--- a/core/my_basic.c
+++ b/core/my_basic.c
@@ -467,7 +467,7 @@ typedef struct _label_t {
 
 #define _CLASS_HASH_FUNC "HASH"
 #define _CLASS_COMPARE_FUNC "COMPARE"
-#define _CLASS_TO_STRING_FUNC "TOSTRING"
+#define _CLASS_TOSTRING_FUNC "TOSTRING"
 
 typedef struct _class_t {
 	_ref_t ref;
@@ -15903,7 +15903,7 @@ _print:
 #ifdef MB_ENABLE_CLASS
 			} else if(val_ptr->type == _DT_CLASS) {
 				bool_t got_tostr = false;
-				_ls_node_t* tsn = _search_identifier_in_class(s, val_ptr->data.instance, _CLASS_TO_STRING_FUNC, 0, 0);
+				_ls_node_t* tsn = _search_identifier_in_class(s, val_ptr->data.instance, _CLASS_TOSTRING_FUNC, 0, 0);
 				if(tsn) {
 					_object_t* tso = (_object_t*)tsn->data;
 					_ls_node_t* tmp = (_ls_node_t*)*l;