diff --git a/src/img2pdf.py b/src/img2pdf.py
index 29522ba..4632c7a 100755
--- a/src/img2pdf.py
+++ b/src/img2pdf.py
@@ -820,7 +820,7 @@ def read_images(rawdata, colorspace, first_frame_only=False):
                 ccittdata = transcode_monochrome(imgdata)
                 imgformat = ImageFormat.CCITTGroup4
                 result.append((color, ndpi, imgformat, ccittdata,
-                               imgwidthpx, imgheightpx))
+                               imgwidthpx, imgheightpx, []))
                 img_page_count += 1
                 continue
             except Exception as e: