diff --git a/src/applications/differential/parser/__tests__/DifferentialChangesetParserTestCase.php b/src/applications/differential/parser/__tests__/DifferentialChangesetParserTestCase.php
--- a/src/applications/differential/parser/__tests__/DifferentialChangesetParserTestCase.php
+++ b/src/applications/differential/parser/__tests__/DifferentialChangesetParserTestCase.php
@@ -3,7 +3,7 @@
 final class DifferentialChangesetParserTestCase extends PhabricatorTestCase {
 
   public function testDiffChangesets() {
-    $hunk = new DifferentialHunkLegacy();
+    $hunk = new DifferentialHunkModern();
     $hunk->setChanges("+a\n b\n-c");
     $hunk->setNewOffset(1);
     $hunk->setNewLen(2);
@@ -20,7 +20,7 @@
     );
 
     foreach ($tests as $changes => $expected) {
-      $hunk = new DifferentialHunkLegacy();
+      $hunk = new DifferentialHunkModern();
       $hunk->setChanges($changes);
       $hunk->setNewOffset(11);
       $hunk->setNewLen(3);
diff --git a/src/applications/differential/parser/__tests__/DifferentialHunkParserTestCase.php b/src/applications/differential/parser/__tests__/DifferentialHunkParserTestCase.php
--- a/src/applications/differential/parser/__tests__/DifferentialHunkParserTestCase.php
+++ b/src/applications/differential/parser/__tests__/DifferentialHunkParserTestCase.php
@@ -14,7 +14,7 @@
     $new_len,
     $changes) {
 
-    $hunk = id(new DifferentialHunkLegacy())
+    $hunk = id(new DifferentialHunkModern())
       ->setOldOffset($old_offset)
       ->setOldLen($old_len)
       ->setNewOffset($new_offset)
diff --git a/src/applications/differential/storage/DifferentialChangeset.php b/src/applications/differential/storage/DifferentialChangeset.php
--- a/src/applications/differential/storage/DifferentialChangeset.php
+++ b/src/applications/differential/storage/DifferentialChangeset.php
@@ -76,11 +76,18 @@
   public function delete() {
     $this->openTransaction();
 
-      $hunks = id(new DifferentialHunkLegacy())->loadAllWhere(
+      $legacy_hunks = id(new DifferentialHunkLegacy())->loadAllWhere(
         'changesetID = %d',
         $this->getID());
-      foreach ($hunks as $hunk) {
-        $hunk->delete();
+      foreach ($legacy_hunks as $legacy_hunk) {
+        $legacy_hunk->delete();
+      }
+
+      $modern_hunks = id(new DifferentialHunkModern())->loadAllWhere(
+        'changesetID = %d',
+        $this->getID());
+      foreach ($modern_hunks as $modern_hunk) {
+        $modern_hunk->delete();
       }
 
       $this->unsavedHunks = array();
diff --git a/src/applications/differential/storage/DifferentialDiff.php b/src/applications/differential/storage/DifferentialDiff.php
--- a/src/applications/differential/storage/DifferentialDiff.php
+++ b/src/applications/differential/storage/DifferentialDiff.php
@@ -132,7 +132,7 @@
       $hunks = $change->getHunks();
       if ($hunks) {
         foreach ($hunks as $hunk) {
-          $dhunk = new DifferentialHunkLegacy();
+          $dhunk = new DifferentialHunkModern();
           $dhunk->setOldOffset($hunk->getOldOffset());
           $dhunk->setOldLen($hunk->getOldLength());
           $dhunk->setNewOffset($hunk->getNewOffset());
diff --git a/src/applications/differential/storage/__tests__/DifferentialHunkTestCase.php b/src/applications/differential/storage/__tests__/DifferentialHunkTestCase.php
--- a/src/applications/differential/storage/__tests__/DifferentialHunkTestCase.php
+++ b/src/applications/differential/storage/__tests__/DifferentialHunkTestCase.php
@@ -5,7 +5,7 @@
   public function testMakeChanges() {
     $root = dirname(__FILE__).'/hunk/';
 
-    $hunk = new DifferentialHunkLegacy();
+    $hunk = new DifferentialHunkModern();
     $hunk->setChanges(Filesystem::readFile($root.'basic.diff'));
     $hunk->setOldOffset(1);
     $hunk->setNewOffset(11);
@@ -23,7 +23,7 @@
     );
     $this->assertEqual($added, $hunk->getAddedLines());
 
-    $hunk = new DifferentialHunkLegacy();
+    $hunk = new DifferentialHunkModern();
     $hunk->setChanges(Filesystem::readFile($root.'newline.diff'));
     $hunk->setOldOffset(1);
     $hunk->setNewOffset(11);
diff --git a/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php b/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
--- a/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
+++ b/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
@@ -382,8 +382,8 @@
         //   -echo "test";
         //   -(empty line)
 
-        $hunk = id(new DifferentialHunkLegacy())->setChanges($context);
-        $vs_hunk = id(new DifferentialHunkLegacy())->setChanges($vs_context);
+        $hunk = id(new DifferentialHunkModern())->setChanges($context);
+        $vs_hunk = id(new DifferentialHunkModern())->setChanges($vs_context);
         if ($hunk->makeOldFile() != $vs_hunk->makeOldFile() ||
             $hunk->makeNewFile() != $vs_hunk->makeNewFile()) {
           return $vs_diff;