diff --git a/src/calibre/gui2/dialogs/metadata_bulk.py b/src/calibre/gui2/dialogs/metadata_bulk.py
index 48b1eec784..f0baaaf17a 100644
--- a/src/calibre/gui2/dialogs/metadata_bulk.py
+++ b/src/calibre/gui2/dialogs/metadata_bulk.py
@@ -211,7 +211,7 @@ class MyBlockingBusyNew(QDialog):  # {{{
                 if cdata:
                     im = Image()
                     im.load(cdata)
-                    im.trim(10)
+                    im.trim(tweaks['cover_trim_fuzz_value'])
                     cdata = im.export('png')
                     cache.set_cover({book_id:cdata})
 
@@ -439,7 +439,7 @@ class MyBlockingBusy(QDialog):  # {{{
                 if cdata:
                     im = Image()
                     im.load(cdata)
-                    im.trim(10)
+                    im.trim(tweaks['cover_trim_fuzz_value'])
                     cdata = im.export('png')
                     self.db.set_cover(id, cdata)
 
diff --git a/src/calibre/gui2/metadata/basic_widgets.py b/src/calibre/gui2/metadata/basic_widgets.py
index 519132bf00..a675220117 100644
--- a/src/calibre/gui2/metadata/basic_widgets.py
+++ b/src/calibre/gui2/metadata/basic_widgets.py
@@ -971,7 +971,7 @@ class Cover(ImageView):  # {{{
             return
         im = Image()
         im.load(cdata)
-        im.trim(10)
+        im.trim(tweaks['cover_trim_fuzz_value'])
         cdata = im.export('png')
         self.current_val = cdata