diff --git a/src/PIL/ImageShow.py b/src/PIL/ImageShow.py
index 57b7dcac7f6..3ffb4d63254 100644
--- a/src/PIL/ImageShow.py
+++ b/src/PIL/ImageShow.py
@@ -71,7 +71,8 @@ def show(self, image, **options):
 
         # save temporary image to disk
         if not (
-            image.mode in ("1", "RGBA") or (self.format == "PNG" and image.mode == "LA")
+            image.mode in ("1", "RGBA")
+            or (self.format == "PNG" and image.mode in ("I;16", "LA"))
         ):
             base = Image.getmodebase(image.mode)
             if image.mode != base: