diff --git a/src/corelib/world.c b/src/corelib/world.c
index 11a8d82..957655e 100644
--- a/src/corelib/world.c
+++ b/src/corelib/world.c
@@ -144,6 +144,12 @@ short _can_collide(const object_t* object) {
 	return object->active && object->enabled;
 }
 
+void object_broadcast_collision(object_t* this, object_t* other) {
+	if(this->collider.evt_collision != NULL) {
+		this->collider.evt_collision(this, other);
+	}
+}
+
 void update_collision() {
 	for(int outer = 0; outer < WORLD_NUM_OBJECTS; ++outer) {
 		object_t* oobject = g_objects + outer;
@@ -153,8 +159,8 @@ void update_collision() {
 			if(!_can_collide(oobject)) continue;
 
 			if(outer != inner && _collision_check(iobject, oobject)) {
-				oobject->collider.evt_collision(oobject, iobject);
-				iobject->collider.evt_collision(iobject, oobject);
+				object_broadcast_collision(oobject, iobject);
+				object_broadcast_collision(iobject, oobject);
 			}
 		}
 	}
@@ -197,8 +203,8 @@ object_t* interpolate_move(object_t* object, float target_x, float target_y, flo
 			object_t* other = g_objects + i;
 			// check collision, return if found
 			if(_can_collide(other) && object != other && _collision_check(other, object)) {
-				other->collider.evt_collision(other, object);
-				object->collider.evt_collision(object, other);
+				object_broadcast_collision(other, object);
+				object_broadcast_collision(object, other);
 				return other;
 			}
 		}
diff --git a/src/corelib/world.h b/src/corelib/world.h
index d82287a..2c57f31 100644
--- a/src/corelib/world.h
+++ b/src/corelib/world.h
@@ -55,6 +55,7 @@ object_t* instantiate_object(const object_t* original);
 collider_t collider_default();
 
 void object_draw_sprite(object_t* object);
+void object_broadcast_evt_collision(object_t* this, object_t* other);
 
 void update_objects();
 void draw_objects();