diff --git a/src/calibre/gui2/tweak_book/editor/canvas.py b/src/calibre/gui2/tweak_book/editor/canvas.py
index 2069a7f56f..4867bd4bba 100644
--- a/src/calibre/gui2/tweak_book/editor/canvas.py
+++ b/src/calibre/gui2/tweak_book/editor/canvas.py
@@ -313,7 +313,7 @@ class Canvas(QWidget):
             if fmt.lower() == 'gif':
                 data = image_to_data(self.current_image, fmt='PNG', png_compression_level=0)
                 from PIL import Image
-                i = Image.open(data)
+                i = Image.open(BytesIO(data))
                 buf = BytesIO()
                 i.save(buf, 'gif')
                 return buf.getvalue()