diff --git a/src/corelib/world.c b/src/corelib/world.c
index 0036b7f..7eb4ddb 100644
--- a/src/corelib/world.c
+++ b/src/corelib/world.c
@@ -37,7 +37,7 @@ int _expand_world() {
 static inline
 size_t _find_free_object() {
 	for(int i = 0; i < _world_objects.num; ++i) {
-		if(object_is_valid(_world_objects.objects[i])) {
+		if(!object_is_valid(_world_objects.objects[i])) {
 			return i;
 		}
 	}
@@ -73,7 +73,7 @@ object_t* instantiate_object(const object_t *original) {
 void world_update() {
 	for(int i = 0; i < _world_objects.num; ++i) {
 		object_t* object = world_get_object(i);
-		if(!object_is_valid(object)
+		if(object_is_valid(object)
 		&& object->evt_update != NULL) {
 			object->evt_update(object);
 		}
@@ -83,7 +83,7 @@ void world_update() {
 void world_draw() {
 	for(int i = 0; i < _world_objects.num; ++i) {
 		object_t* object = world_get_object(i);
-		if(!object_is_valid(object)
+		if(object_is_valid(object)
 		&& object->evt_draw != NULL) {
 			object->evt_draw(object);
 		}