diff --git a/GeoLib/Grid.h b/GeoLib/Grid.h
index d119ac3e87911eb7645ff097eb086674044569af..46a521ae0c9bc7e918e4f0e814d1a150a606a935 100644
--- a/GeoLib/Grid.h
+++ b/GeoLib/Grid.h
@@ -50,7 +50,7 @@ public:
      */
     template <typename InputIterator>
     Grid(InputIterator first, InputIterator last,
-         std::size_t max_num_per_grid_cell = 512);
+         std::size_t max_num_per_grid_cell = 16);
 
     Grid(Grid const&) = delete;
     Grid& operator=(Grid const&) = delete;