diff --git a/src/img2pdf.py b/src/img2pdf.py
index 76439c3..3b9ba99 100755
--- a/src/img2pdf.py
+++ b/src/img2pdf.py
@@ -1832,10 +1832,7 @@ def read_images(
             )
     else:
         logger.debug("PIL format = %s", imgdata.format)
-        try:
-            imgformat = ImageFormat[imgdata.format]
-        except KeyError:
-            imgformat = ImageFormat.other
+        imgformat = getattr(ImageFormat, imgdata.format, ImageFormat.other)
 
     def cleanup():
         if imgdata is not None: