diff --git a/.travis.yml b/.travis.yml
index 91be7da..405bc84 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,7 @@ php:
   - 5.6
   - 7.0
   - 7.1
+  - nightly
 
 notifications:
   email: neeke@php.net
diff --git a/druid.c b/druid.c
index 1faf4c9..1c415f9 100644
--- a/druid.c
+++ b/druid.c
@@ -137,7 +137,7 @@ ZEND_END_ARG_INFO()
 const zend_function_entry druid_methods[] =
 {
     PHP_ME(DRUID_NAME, __construct,             druid_void_arginfo, ZEND_ACC_CTOR|ZEND_ACC_PRIVATE)
-    PHP_ME(DRUID_NAME, __clone,                 NULL, ZEND_ACC_CLONE|ZEND_ACC_PRIVATE)
+    PHP_ME(DRUID_NAME, __clone,                 NULL, ZEND_ACC_PRIVATE)
     PHP_ME(DRUID_NAME, __sleep,                 NULL, ZEND_ACC_PRIVATE)
     PHP_ME(DRUID_NAME, __wakeup,                NULL, ZEND_ACC_PRIVATE)
     PHP_ME(DRUID_NAME, __destruct,              NULL, ZEND_ACC_PUBLIC | ZEND_ACC_DTOR)