diff --git a/markup/img.py b/markup/img.py
index e6c6a14..242bfb5 100644
--- a/markup/img.py
+++ b/markup/img.py
@@ -144,7 +144,7 @@ def write_square_or_circle(obj, mediabox, path):
     if obj["Subtype"] == LIT('Square'):
         draw.rectangle(obj['Rect'], fill=None, outline='black', width=3)
     else:
-        draw.ellipse(*obj['Rect'], fill=None, outline='black', width=3)
+        draw.ellipse(obj['Rect'], fill=None, outline='black', width=3)
 
     # account for the difference in coordinate systems
     # between pdf and images.