PIL Load JPEG file error.

Traceback (most recent call last):
  File "/home/mauro/tkinter_image.py", line 21, in <module>
    img = ImageTk.PhotoImage(Image.open(File))
  File "/usr/local/lib/python2.7/dist-packages/PIL/ImageTk.py", line 116, in __init__
    self.paste(image)
  File "/usr/local/lib/python2.7/dist-packages/PIL/ImageTk.py", line 166, in paste
    im.load()
  File "/usr/local/lib/python2.7/dist-packages/PIL/ImageFile.py", line 189, in load
    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
  File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 385, in _getdecoder
    raise IOError("decoder %s not available" % decoder_name)
IOError: decoder jpeg not available