diff --git a/docs/ref/forms/fields.txt b/docs/ref/forms/fields.txt
index 486d49d..082ec17 100644
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b
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For each field, we describe the default widget used if you don't specify
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591 | 591 | * Error message keys: ``required``, ``invalid``, ``missing``, ``empty``, |
592 | 592 | ``invalid_image`` |
593 | 593 | |
594 | | Using an ImageField requires that the `Python Imaging Library`_ is installed. |
| 594 | Using an ``ImageField`` requires that the `Python Imaging Library`_ (PIL) |
| 595 | is installed and supports the image formats you use. If you encounter a |
| 596 | ``corrupt image`` error when you upload an image, it usually means PIL |
| 597 | doesn't understand its format. To fix this, install the appropriate |
| 598 | library and reinstall PIL. |
595 | 599 | |
596 | 600 | When you use an ``ImageField`` on a form, you must also remember to |
597 | 601 | :ref:`bind the file data to the form <binding-uploaded-files>`. |