diff --git a/base/rtree.go b/base/rtree.go
index 4a66235..0b64ca0 100644
--- a/base/rtree.go
+++ b/base/rtree.go
@@ -183,6 +183,7 @@ type treeItem struct {
 	item     interface{}
 }
 
+//go:nocheckptr
 func (item *treeItem) unsafeNode() *treeNode {
 	return (*treeNode)(unsafe.Pointer(item))
 }