diff --git a/src/raytracer/main.c b/src/raytracer/main.c
index 1d4b455..15d2f21 100644
--- a/src/raytracer/main.c
+++ b/src/raytracer/main.c
@@ -237,13 +237,14 @@ intersection_t find_closest_intersection(vec3f_t origin, vec3f_t direction,
 f32 calculate_lighting_for_intersection(vec3f_t origin, vec3f_t direction,
                                         intersection_t intersection,
                                         const scene_t *scene) {
-  vec3f_t position = vec_add(
-      vec3f_t, origin, vec_mul_num(vec3f_t, direction, intersection.closest_t));
+  vec3f_t _direction = vec_mul_num(vec3f_t, direction, intersection.closest_t);
+  vec3f_t position = vec_add(vec3f_t, origin, _direction);
 
   vec3f_t surface_normal =
       vec_sub(vec3f_t, position, intersection.closest_sphere->centre);
-  surface_normal = vec_div_num(vec3f_t, surface_normal,
-                               vec_magnitude(vec3f_t, surface_normal));
+
+  f32 normal_magnitude = vec_magnitude(vec3f_t, surface_normal);
+  surface_normal = vec_div_num(vec3f_t, surface_normal, normal_magnitude);
 
   vec3f_t view_vector = vec_mul_num(vec3f_t, direction, -1.0f);