Jython-friendly tweak.
diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index 1b487ef..4eab318 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -156,7 +156,7 @@
     The module is not entered into sys.modules.
 
     """
-    return type(sys)(name)
+    return type(_io)(name)
 
 
 # Finder/loader utility code ##################################################