diff --git a/core/src/physics_world.c b/core/src/physics_world.c
index a2ff7a4..3b328cf 100644
--- a/core/src/physics_world.c
+++ b/core/src/physics_world.c
@@ -84,7 +84,7 @@ void _internal_physics_narrow_collision() {
 
     PhysicsEntity* right = NULL;
     list_foreach(PhysicsEntity*, left, &_world_bodies) {
-        for(size_t right_index = 0; right_index < half_end; ++right_index) {
+        for(size_t right_index = 0; right_index <= half_end; ++right_index) {
             right = list_at_as(PhysicsEntity, &_world_bodies, right_index);
 
             if(left->data == right->data) continue;