diff --git a/modules/config.xqm b/modules/config.xqm
index 1c1f9a2d..859f27fc 100644
--- a/modules/config.xqm
+++ b/modules/config.xqm
@@ -158,6 +158,9 @@ declare variable $config:facets := [
         "dimension": "feature",
         "heading": "facets.feature",
         "source": "api/search/facets/feature",
+        "output": function($label) {
+            upper-case(substring($label,1,1)) || substring($label, 2)
+        },
         "max": 5,
         "hierarchical": false()
     },
diff --git a/modules/facets.xql b/modules/facets.xql
index 5f21d43c..e465f4df 100644
--- a/modules/facets.xql
+++ b/modules/facets.xql
@@ -23,12 +23,13 @@ import module namespace config="http://www.tei-c.org/tei-simple/config" at "conf
 
 declare namespace tei="http://www.tei-c.org/ns/1.0";
 
-declare function facets:sort($facets as map(*)?) {
+declare function facets:sort($config as map(*), $facets as map(*)?) {
     array {
         if (exists($facets)) then
             for $key in map:keys($facets)
             let $value := map:get($facets, $key)
-            order by $key ascending
+            let $sortKey := if (exists($config?output)) then $config?output($key) else $key
+            order by $sortKey ascending
             return
                 map { $key: $value }
         else
@@ -49,7 +50,7 @@ declare function facets:print-table($config as map(*), $nodes as element()+, $va
         if (map:size($facets) > 0) then
             <table>
             {
-                array:for-each(facets:sort($facets), function($entry) {
+                array:for-each(facets:sort($config, $facets), function($entry) {
                     map:for-each($entry, function($label, $freq) {
                         let $content := facets:translate($config, $lang, $label)
                         return
diff --git a/modules/lib/api/search.xql b/modules/lib/api/search.xql
index c9ba4104..26055fd5 100644
--- a/modules/lib/api/search.xql
+++ b/modules/lib/api/search.xql
@@ -132,7 +132,6 @@ declare function sapi:list-facets($request as map(*)) {
     })
     let $hits := session:get-attribute($config:session-prefix || ".hits")
     let $facets := ft:facets($hits, $type, ())
-    
     let $matches := 
         for $key in if (exists($request?parameters?value)) then $request?parameters?value else map:keys($facets)
         let $label := facets:translate($facetConfig, $lang, $key)