diff --git a/timm/data/parsers/constants.py b/timm/data/parsers/constants.py
index e7ba484e72..b4d10dce9d 100644
--- a/timm/data/parsers/constants.py
+++ b/timm/data/parsers/constants.py
@@ -1 +1 @@
-IMG_EXTENSIONS = ('.png', '.jpg', '.jpeg')
+IMG_EXTENSIONS = ('.png', '.jpg', '.jpeg', '.tif')