diff --git a/apps/dav/lib/Migration/Version1004Date20170919104507.php b/apps/dav/lib/Migration/Version1004Date20170919104507.php
new file mode 100644
index 00000000000..3a0fb1ab904
--- /dev/null
+++ b/apps/dav/lib/Migration/Version1004Date20170919104507.php
@@ -0,0 +1,36 @@
+<?php
+namespace OCA\DAV\Migration;
+
+use Doctrine\DBAL\Schema\Schema;
+use OCP\Migration\SimpleMigrationStep;
+use OCP\Migration\IOutput;
+
+class Version1004Date20170919104507 extends SimpleMigrationStep {
+
+	/**
+	 * @param IOutput $output
+	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param array $options
+	 * @return null|Schema
+	 * @since 13.0.0
+	 */
+	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
+		/** @var Schema $schema */
+		$schema = $schemaClosure();
+
+		$table = $schema->getTable('addressbooks');
+		$column = $table->getColumn('id');
+		$column->setUnsigned(true);
+
+		$table = $schema->getTable('calendarobjects');
+		$column = $table->getColumn('id');
+		$column->setUnsigned(true);
+
+		$table = $schema->getTable('calendarchanges');
+		$column = $table->getColumn('id');
+		$column->setUnsigned(true);
+
+		return $schema;
+	}
+
+}