diff --git a/src/MongoDB/Manager.c b/src/MongoDB/Manager.c
index 248e62da2..cc1b75cd4 100644
--- a/src/MongoDB/Manager.c
+++ b/src/MongoDB/Manager.c
@@ -807,7 +807,7 @@ ZEND_BEGIN_ARG_INFO_EX(ai_Manager_executeBulkWrite, 0, 0, 2)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(ai_Manager_selectServer, 0, 0, 1)
-	ZEND_ARG_OBJ_INFO(0, readPreference, MongoDB\\Driver\\ReadPreference, 1)
+	ZEND_ARG_OBJ_INFO(0, readPreference, MongoDB\\Driver\\ReadPreference, 0)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(ai_Manager_startSession, 0, 0, 0)