diff --git a/resources/default_tweaks.py b/resources/default_tweaks.py
index d8e158f842..411aab42a8 100644
--- a/resources/default_tweaks.py
+++ b/resources/default_tweaks.py
@@ -385,6 +385,14 @@ sort_dates_using_visible_fields = False
 generate_cover_title_font = None
 generate_cover_foot_font = None
 
+#: Fuzz parameter value for cover trim
+# The value used by ImageMagick for the
+# fuzz distance when triming a cover.
+# Colors within this distance are considered equal. 
+# The distance can be in absolute intensity units or,
+# by appending %, a percentage of the maximum possible intensity
+cover_trim_fuzz_value = 10
+
 #: Control behavior of the book list
 # You can control the behavior of doubleclicks on the books list.
 # Choices: open_viewer, do_nothing,