diff --git a/src/lib.rs b/src/lib.rs
index a866207..d69d533 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -16,7 +16,7 @@ mod fem;
 mod tree;
 mod voxel;
 
-pub use fem::{Blocks, FiniteElements, HexahedralFiniteElements, Smoothing, NUM_NODES_HEX};
+pub use fem::{Blocks, FiniteElements, HexahedralFiniteElements, Smoothing};
 pub use tree::{Octree, Tree};
 pub use voxel::{VoxelData, Voxels};
 
diff --git a/src/tree/mod.rs b/src/tree/mod.rs
index d84994f..78387ce 100644
--- a/src/tree/mod.rs
+++ b/src/tree/mod.rs
@@ -2,8 +2,8 @@
 use std::time::Instant;
 
 use super::{
-    fem::NODE_NUMBERING_OFFSET, Coordinate, Coordinates, HexahedralFiniteElements, Vector,
-    VoxelData, Voxels, NUM_NODES_HEX,
+    fem::{NODE_NUMBERING_OFFSET, NUM_NODES_HEX},
+    Coordinate, Coordinates, HexahedralFiniteElements, Vector, VoxelData, Voxels,
 };
 use flavio::math::{Tensor, TensorArray};
 use ndarray::{s, Axis};