diff --git a/gallery_dl/extractor/hitomi.py b/gallery_dl/extractor/hitomi.py
index 9b747005..18df9dfa 100644
--- a/gallery_dl/extractor/hitomi.py
+++ b/gallery_dl/extractor/hitomi.py
@@ -89,6 +89,7 @@ class HitomiGalleryExtractor(GalleryExtractor):
                     path = ext = "webp"
             ihash = image["hash"]
             idata = text.nameext_from_url(image["name"])
+            idata["extension_original"] = idata["extension"]
             if ext:
                 idata["extension"] = ext
 
diff --git a/test/results/hitomi.py b/test/results/hitomi.py
index 5f1b9e36..78fa0799 100644
--- a/test/results/hitomi.py
+++ b/test/results/hitomi.py
@@ -20,6 +20,7 @@ __tests__ = (
     "count"     : 16,
     "date"      : "dt:2015-10-27 19:20:00",
     "extension" : "webp",
+    "extension_original" : "jpg",
     "filename"  : str,
     "gallery_id": 867789,
     "group"     : [],