diff --git a/core/my_basic.c b/core/my_basic.c
index 4c7308e..d3803db 100755
--- a/core/my_basic.c
+++ b/core/my_basic.c
@@ -3961,12 +3961,14 @@ static int _eval_routine(mb_interpreter_t* s, _ls_node_t** l, mb_value_t* va, un
 		result = _eval_script_routine(s, l, va, ca, r, has_arg, pop_arg);
 #ifdef MB_ENABLE_LAMBDA
 	} else if(r->type == _IT_LAMBDA && r->func.lambda.entry) {
+#	ifdef MB_ENABLE_STACK_TRACE
 		_ls_node_t* top = _ls_back(s->stack_frames);
 		if(top) {
 			char ln[32];
 			sprintf(ln, "LAMBDA_0x%p", &r->func.lambda.ref);
 			top->data = ln;
 		}
+#	endif /* MB_ENABLE_STACK_TRACE */
 		result = _eval_lambda_routine(s, l, va, ca, r, has_arg, pop_arg);
 #endif /* MB_ENABLE_LAMBDA */
 	} else if(r->type == _IT_NATIVE && r->func.native.entry) {