diff --git a/include/aabb.h b/include/aabb.h
index a14f079..1686e25 100644
--- a/include/aabb.h
+++ b/include/aabb.h
@@ -3,25 +3,25 @@
 struct AABB {
     glm::vec3 min, max;
 
-    glm::vec3 center() const {
+    [[nodiscard]] glm::vec3 center() const {
         return 0.5f * (max + min);
     }
 
-    glm::vec3 extent() const {
+    [[nodiscard]] glm::vec3 extent() const {
         return max - center();
     }
 
-    bool contains(const glm::vec3 point) const {
+    [[nodiscard]] bool contains(const glm::vec3 point) const {
         return glm::all(glm::lessThan(point, max)) && glm::all(glm::greaterThan(point, min));
     }
 
-    bool inside(const AABB extent) const {
+    [[nodiscard]] bool inside(const AABB extent) const {
         return (
             max.x > extent.min.x && min.x < extent.max.x && max.y > extent.min.y && min.y < extent.max.y &&
             max.z > extent.min.z && min.z < extent.max.z);
     }
 
-    bool contains(const Ray& ray) const {
+    [[nodiscard]] bool contains(const Ray& ray) const {
         const float t1 = (min.x - ray.origin.x) / ray.direction.x;
         const float t2 = (max.x - ray.origin.x) / ray.direction.x;
         const float t3 = (min.y - ray.origin.y) / ray.direction.y;