diff --git a/pdfparanoia/plugins/sciencemagazine.py b/pdfparanoia/plugins/sciencemagazine.py
index 033fdb3..32c25eb 100644
--- a/pdfparanoia/plugins/sciencemagazine.py
+++ b/pdfparanoia/plugins/sciencemagazine.py
@@ -37,7 +37,7 @@ class ScienceMagazine(Plugin):
             obj = pdf.getobj(objid)
 
             if hasattr(obj, "attrs"):
-                if "Width" in obj.attrs) and str(obj.attrs["Width"]) == "432":
+                if ("Width" in obj.attrs) and str(obj.attrs["Width"]) == "432":
                     if "Height" in obj.attrs and str(obj.attrs["Height"]) == "230":
                         evil_ids.append(objid)