diff --git a/src/main.rs b/src/main.rs
index 5773299..6279ba2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,8 +16,9 @@ mod support;
 #[derive(Copy, Clone, Debug)]
 struct PerInstance {
     pub w_position: (f32, f32, f32),
+    pub w_rotation: f32,
 }
-implement_vertex!(PerInstance, w_position);
+implement_vertex!(PerInstance, w_position, w_rotation);
 
 const BIOMES_NUMBER: usize = 19;
 const BIOMES: [&str; BIOMES_NUMBER] = [
@@ -195,6 +196,7 @@ fn main() {
                 uniform mat4 view_matrix;
 
                 in vec3 w_position;
+                in float w_rotation;
                 in vec3 position;
                 in vec2 texture;
                 out vec2 v_texture;
@@ -224,9 +226,11 @@ fn main() {
     let per_instance = vec![
         PerInstance {
             w_position: (0.0, 0.0, 0.0),
+            w_rotation: 0.0,
         },
         PerInstance {
             w_position: (1.0, 0.0, 0.0),
+            w_rotation: 0.0,
         },
     ];