diff --git a/src/corelib/physics.c b/src/corelib/physics.c
index 001348c..02890e3 100644
--- a/src/corelib/physics.c
+++ b/src/corelib/physics.c
@@ -191,9 +191,9 @@ void solve_collision_slide(object_t* left, object_t* right) {
 static inline
 void _solve_move(object_t* this) {
 	// loop over all objects and check collision if applicable
-	for(int i = 0; i < WORLD_NUM_OBJECTS; ++i) {
+	for(int i = 0; i < world_num_objects(); ++i) {
 		// get pointer to other object
-		object_t* other = g_objects + i;
+		object_t* other = world_get_object(i);
 		// check collision, return if found
 		if(can_collide(other) && this != other && _collision_check(other, this)) {
 			object_broadcast_collision(other, this);