diff --git a/Zend/zend.c b/Zend/zend.c
index 22a92a6a0a7..7ac5114a863 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -567,6 +567,7 @@ static void executor_globals_ctor(zend_executor_globals *executor_globals) /* {{
 #ifdef ZEND_WIN32
 	zend_get_windows_version_info(&executor_globals->windows_version_info);
 #endif
+	executor_globals->valid_symbol_table = 0;
 }
 /* }}} */