diff --git a/include/orm/tiny/relations/belongsto.hpp b/include/orm/tiny/relations/belongsto.hpp
index 944dffb73..330675a8a 100644
--- a/include/orm/tiny/relations/belongsto.hpp
+++ b/include/orm/tiny/relations/belongsto.hpp
@@ -329,9 +329,9 @@ namespace Orm::Tiny::Relations
                 keys << std::move(value);
         }
 
-        return keys |= ranges::actions::sort(ranges::less {}, [](const auto &key)
+        return keys |= ranges::actions::sort(ranges::less {}, [](const auto &key_)
         {
-            return key.template value<typename Model::KeyType>();
+            return key_.template value<typename Model::KeyType>();
         })
                 | ranges::actions::unique;
     }
diff --git a/include/orm/tiny/relations/relation.hpp b/include/orm/tiny/relations/relation.hpp
index 24df715ea..ef9d04219 100644
--- a/include/orm/tiny/relations/relation.hpp
+++ b/include/orm/tiny/relations/relation.hpp
@@ -329,9 +329,9 @@ namespace Relations
             keys.append(key.isEmpty() ? model.getKey()
                                       : model.getAttribute(key));
 
-        return keys |= ranges::actions::sort(ranges::less {}, [](const auto &key)
+        return keys |= ranges::actions::sort(ranges::less {}, [](const auto &key_)
         {
-            return key.template value<typename Model::KeyType>();
+            return key_.template value<typename Model::KeyType>();
         })
                 | ranges::actions::unique;
     }