diff --git a/delphivcl/__init__.py b/delphivcl/__init__.py
index 6a69104..0e1436b 100644
--- a/delphivcl/__init__.py
+++ b/delphivcl/__init__.py
@@ -2,6 +2,8 @@
 import os
 import platform
 import importlib
+import importlib.machinery
+import importlib.util
 
 
 def find_extension_module():