diff --git a/php_phongo.c b/php_phongo.c
index 9b2f5f78..9e723169 100644
--- a/php_phongo.c
+++ b/php_phongo.c
@@ -557,7 +557,8 @@ void php_phongo_objectid_new_from_oid(zval *object, const bson_oid_t *oid TSRMLS
 	object_init_ex(object, php_phongo_objectid_ce);
 
 	intern = (php_phongo_objectid_t *)zend_object_store_get_object(object TSRMLS_CC);
-	intern->oid = oid;
+	intern->oid = ecalloc(1, sizeof(bson_oid_t));
+	bson_oid_copy(oid, (bson_oid_t *)intern->oid);
 } /* }}} */
 
 /* {{{ Iterator */