diff --git a/bootstrapvz/plugins/minimize_size/assets/bootstrap-files-filter.sh b/bootstrapvz/plugins/minimize_size/assets/bootstrap-files-filter.sh
index 886187a..e061972 100644
--- a/bootstrapvz/plugins/minimize_size/assets/bootstrap-files-filter.sh
+++ b/bootstrapvz/plugins/minimize_size/assets/bootstrap-files-filter.sh
@@ -1,2 +1,4 @@
 #!/bin/sh
+# First we filter out all paths not relating to the stuff we want to filter
+# After that we take out the paths  that we *do* want to keep
 grep 'EXCLUDE_PATTERN' | grep --invert-match --fixed-strings 'INCLUDE_PATHS'
diff --git a/bootstrapvz/plugins/minimize_size/tasks/dpkg.py b/bootstrapvz/plugins/minimize_size/tasks/dpkg.py
index ff75b13..9e6e148 100644
--- a/bootstrapvz/plugins/minimize_size/tasks/dpkg.py
+++ b/bootstrapvz/plugins/minimize_size/tasks/dpkg.py
@@ -49,6 +49,9 @@ class CreateBootstrapFilterScripts(Task):
 
 		sed_i(bootstrap_script, r'BOOTSTRAP_FILES_FILTER_PATH', filter_script)
 
+		# We exclude with patterns but include with fixed strings
+		# The pattern matching when excluding is needed in order to filter
+		# everything below e.g. /usr/share/locale but not the folder itself
 		filter_lists = info._minimize_size['bootstrap_filter']
 		exclude_list = '\|'.join(map(lambda p: '.' + p + '.\+', filter_lists['exclude']))
 		include_list = '\n'.join(map(lambda p: '.' + p, filter_lists['include']))