diff --git a/callbacks/query.go b/callbacks/query.go
index 5a97e1ad..658216df 100644
--- a/callbacks/query.go
+++ b/callbacks/query.go
@@ -172,7 +172,9 @@ func Preload(db *gorm.DB) {
 			if name == clause.Associations {
 				for _, rel := range db.Statement.Schema.Relationships.Relations {
 					if rel.Schema == db.Statement.Schema {
-						preloadMap[rel.Name] = map[string][]interface{}{}
+						if _, ok := preloadMap[rel.Name]; !ok {
+							preloadMap[rel.Name] = map[string][]interface{}{}
+						}
 					}
 				}
 			} else {