diff --git a/IPython/core/inputtransformer.py b/IPython/core/inputtransformer.py
index d3a8ba7..9036add 100644
--- a/IPython/core/inputtransformer.py
+++ b/IPython/core/inputtransformer.py
@@ -6,17 +6,12 @@ This includes the machinery to recognise and transform ``%magic`` commands,
 import abc
 import functools
 import re
+from io import StringIO
 
 from IPython.core.splitinput import LineInfo
 from IPython.utils import tokenize2
-from IPython.utils.py3compat import PY3
 from IPython.utils.tokenize2 import generate_tokens, untokenize, TokenError
 
-if PY3:
-    from io import StringIO
-else:
-    from StringIO import StringIO
-
 #-----------------------------------------------------------------------------
 # Globals
 #-----------------------------------------------------------------------------