diff --git a/resources/sql/patches/124.subpriority.sql b/resources/sql/patches/124.subpriority.sql
index c666238061..2a00e73e19 100644
--- a/resources/sql/patches/124.subpriority.sql
+++ b/resources/sql/patches/124.subpriority.sql
@@ -6,6 +6,6 @@ ALTER TABLE phabricator_maniphest.maniphest_task
 
 /* Seed the subpriority column with reasonable values that keep order stable. */
 UPDATE phabricator_maniphest.maniphest_task
-  SET subpriority = dateModified;
+  SET subpriority = (UNIX_TIMESTAMP() - dateModified);