diff --git a/jedi/inference/compiled/subprocess/__main__.py b/jedi/inference/compiled/subprocess/__main__.py
index 5e92229f5..4538761f7 100644
--- a/jedi/inference/compiled/subprocess/__main__.py
+++ b/jedi/inference/compiled/subprocess/__main__.py
@@ -18,6 +18,9 @@ def _get_paths():
 if sys.version_info > (3, 4):
     from importlib.machinery import PathFinder
 
+    import importlib
+    importlib.machinery.SOURCE_SUFFIXES.append('.star')
+
     class _ExactImporter(object):
         def __init__(self, path_dct):
             self._path_dct = path_dct