diff --git a/resources/sql/autopatches/20180210.hunk.01.droplegacy.sql b/resources/sql/autopatches/20180210.hunk.01.droplegacy.sql
new file mode 100644
index 0000000000..129d3927d8
--- /dev/null
+++ b/resources/sql/autopatches/20180210.hunk.01.droplegacy.sql
@@ -0,0 +1 @@
+DROP TABLE {$NAMESPACE}_differential.differential_hunk;
diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 13dd7374d2..eebfd512d0 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -481,7 +481,6 @@ phutil_register_library_map(array(
     'DifferentialInlineCommentQuery' => 'applications/differential/query/DifferentialInlineCommentQuery.php',
     'DifferentialJIRAIssuesCommitMessageField' => 'applications/differential/field/DifferentialJIRAIssuesCommitMessageField.php',
     'DifferentialJIRAIssuesField' => 'applications/differential/customfield/DifferentialJIRAIssuesField.php',
-    'DifferentialLegacyHunk' => 'applications/differential/storage/DifferentialLegacyHunk.php',
     'DifferentialLegacyQuery' => 'applications/differential/constants/DifferentialLegacyQuery.php',
     'DifferentialLineAdjustmentMap' => 'applications/differential/parser/DifferentialLineAdjustmentMap.php',
     'DifferentialLintField' => 'applications/differential/customfield/DifferentialLintField.php',
@@ -5644,7 +5643,6 @@ phutil_register_library_map(array(
     'DifferentialInlineCommentQuery' => 'PhabricatorOffsetPagedQuery',
     'DifferentialJIRAIssuesCommitMessageField' => 'DifferentialCommitMessageCustomField',
     'DifferentialJIRAIssuesField' => 'DifferentialStoredCustomField',
-    'DifferentialLegacyHunk' => 'DifferentialHunk',
     'DifferentialLegacyQuery' => 'Phobject',
     'DifferentialLineAdjustmentMap' => 'Phobject',
     'DifferentialLintField' => 'DifferentialHarbormasterField',
diff --git a/src/applications/differential/storage/DifferentialLegacyHunk.php b/src/applications/differential/storage/DifferentialLegacyHunk.php
deleted file mode 100644
index ae4673e46c..0000000000
--- a/src/applications/differential/storage/DifferentialLegacyHunk.php
+++ /dev/null
@@ -1,37 +0,0 @@
-<?php
-
-final class DifferentialLegacyHunk extends DifferentialHunk {
-
-  protected $changes;
-
-  protected function getConfiguration() {
-    return array(
-      self::CONFIG_COLUMN_SCHEMA => array(
-        'changes' => 'text?',
-        'oldOffset' => 'uint32',
-        'oldLen' => 'uint32',
-        'newOffset' => 'uint32',
-        'newLen' => 'uint32',
-      ),
-      self::CONFIG_KEY_SCHEMA => array(
-        'changesetID' => array(
-          'columns' => array('changesetID'),
-        ),
-      ),
-    ) + parent::getConfiguration();
-  }
-
-  public function getTableName() {
-    return 'differential_hunk';
-  }
-
-  public function getDataEncoding() {
-    return 'utf8';
-  }
-
-  public function forceEncoding($encoding) {
-    // Not supported, these are always utf8.
-    return $this;
-  }
-
-}