diff --git a/src/calibre/ebooks/metadata/docx.py b/src/calibre/ebooks/metadata/docx.py
index 31b0c48974..ea34d27d3a 100644
--- a/src/calibre/ebooks/metadata/docx.py
+++ b/src/calibre/ebooks/metadata/docx.py
@@ -27,7 +27,7 @@ def get_metadata(stream):
                     width, height, fmt = identify_data(raw)
                 except:
                     continue
-                if 0.8 <= height/width <= 1.8 and height*width >= 12000:
+                if 0.8 <= height/width <= 1.8 and height*width >= 160000:
                     cdata = (fmt, raw)
         if cdata is not None:
             mi.cover_data = cdata