diff --git a/src/biber/sort.xml b/src/biber/sort.xml
index 1fbe83fe94fc874994739fcdee2e572677db42c5..e56e9cbcfc751f80bbe22a59bea333b2d091d930 100644
--- a/src/biber/sort.xml
+++ b/src/biber/sort.xml
@@ -15,7 +15,7 @@
             <sortitem order="1">author</sortitem>
         </sort>
         <sort order="3">
-            <sortitem order="1">title</sortitem>
+            <sortitem order="1">core</sortitem>
         </sort>
     </sortingtemplate>
     <sourcemap>