diff --git a/generator/world_map_generator.hpp b/generator/world_map_generator.hpp
index fade53f844..0060cf8b47 100644
--- a/generator/world_map_generator.hpp
+++ b/generator/world_map_generator.hpp
@@ -48,7 +48,8 @@ class WorldMapGenerator
 public:
   template <class TInfo>
   explicit WorldMapGenerator(TInfo const & info)
-    : m_worldBucket(info), m_merger(POINT_COORD_BITS)
+    : m_worldBucket(info),
+      m_merger(POINT_COORD_BITS - (scales::GetUpperScale() - scales::GetUpperWorldScale()) / 2)
   {
     // Do not strip last types for given tags,
     // for example, do not cut 'admin_level' in  'boundary-administrative-XXX'.