diff --git a/util/koji-gc b/util/koji-gc
index 254d208a..2f0ae02e 100755
--- a/util/koji-gc
+++ b/util/koji-gc
@@ -129,8 +129,9 @@ def get_options():
         config = None
     else:
         config.read(cf)
-        #allow config file to update defaults for certain options
+        # List of values read from config file to update default parser values
         cfgmap = [
+            # name, alias, type
             ['keytab', None, 'string'],
             ['principal', None, 'string'],
             ['krbservice', None, 'string'],