diff --git a/src/resources/lexicon.cfg b/src/resources/lexicon.cfg
index 8f0d826..7185b72 100644
--- a/src/resources/lexicon.cfg
+++ b/src/resources/lexicon.cfg
@@ -44,6 +44,12 @@ TUV
 WXYZ
 <<<INDEX_LIST<<<
 
+# The default sorting to use on the contents page.
+# Allowed values are "?byturn" and "?byindex".
+>>>DEFAULT_SORT>>>
+?byturn
+<<<DEFAULT_SORT<<<
+
 # Graphviz file name. If present, the graph of page citations will be written
 # in the dot file format.
 >>>GRAPHVIZ_FILE>>>