diff --git a/docs/handbook/image-file-formats.rst b/docs/handbook/image-file-formats.rst
index ed0c3ae5b..11ec60401 100644
--- a/docs/handbook/image-file-formats.rst
+++ b/docs/handbook/image-file-formats.rst
@@ -77,8 +77,8 @@ Reading sequences
 ~~~~~~~~~~~~~~~~~
 
 The GIF loader supports the :py:meth:`~file.seek` and :py:meth:`~file.tell`
-methods. You can seek to the next frame (``im.seek(im.tell() + 1``), or rewind
-the file by seeking to the first frame. Random access is not supported.
+methods. You can seek to the next frame (``im.seek(im.tell() + 1)``), or rewind
+the file by seeking to the first frame. Random access is not supported. ``im.seek()`` raises an ``EOFError`` if you try to seek after the last frame.
 
 Reading local images
 ~~~~~~~~~~~~~~~~~~~~