diff --git a/mongox/utils/isnil.go b/mongox/utils/isnil.go
index 9c32162..d3f13f7 100644
--- a/mongox/utils/isnil.go
+++ b/mongox/utils/isnil.go
@@ -8,7 +8,7 @@ import (
 func IsNil(i interface{}) bool {
 
 	type iface struct {
-		_   *interface{}
+		_   unsafe.Pointer
 		ptr unsafe.Pointer
 	}