diff --git a/includes/api/ApiImportReporter.php b/includes/api/ApiImportReporter.php
index 21d9d235dc5..be53c67c331 100644
--- a/includes/api/ApiImportReporter.php
+++ b/includes/api/ApiImportReporter.php
@@ -29,13 +29,13 @@ class ApiImportReporter extends ImportReporter {
 
 	/**
 	 * @param Title $title
-	 * @param Title $origTitle
+	 * @param ForeignTitle $foreignTitle
 	 * @param int $revisionCount
 	 * @param int $successCount
 	 * @param array $pageInfo
 	 * @return void
 	 */
-	public function reportPage( $title, $origTitle, $revisionCount, $successCount, $pageInfo ) {
+	public function reportPage( $title, $foreignTitle, $revisionCount, $successCount, $pageInfo ) {
 		// Add a result entry
 		$r = [];
 
@@ -51,7 +51,7 @@ class ApiImportReporter extends ImportReporter {
 		$this->mResultArr[] = $r;
 
 		// Piggyback on the parent to do the logging
-		parent::reportPage( $title, $origTitle, $revisionCount, $successCount, $pageInfo );
+		parent::reportPage( $title, $foreignTitle, $revisionCount, $successCount, $pageInfo );
 	}
 
 	public function getData() {
diff --git a/includes/export/DumpFileOutput.php b/includes/export/DumpFileOutput.php
index 4bec7d4532b..d0256fd877f 100644
--- a/includes/export/DumpFileOutput.php
+++ b/includes/export/DumpFileOutput.php
@@ -27,7 +27,10 @@
  * @ingroup Dump
  */
 class DumpFileOutput extends DumpOutput {
-	protected $handle = false, $filename;
+	/** @var resource|false */
+	protected $handle = false;
+	/** @var string */
+	protected $filename;
 
 	/**
 	 * @param string $file
@@ -73,7 +76,7 @@ class DumpFileOutput extends DumpOutput {
 	}
 
 	/**
-	 * @param array $newname
+	 * @param string|string[] $newname
 	 * @return string
 	 * @throws MWException
 	 */
diff --git a/includes/export/WikiExporter.php b/includes/export/WikiExporter.php
index fe6dadfe22f..3ab88e29279 100644
--- a/includes/export/WikiExporter.php
+++ b/includes/export/WikiExporter.php
@@ -125,7 +125,7 @@ class WikiExporter {
 	 * various row objects and XML output for filtering. Filters
 	 * can be chained or used as callbacks.
 	 *
-	 * @param DumpOutput &$sink
+	 * @param DumpOutput|DumpFilter &$sink
 	 */
 	public function setOutputSink( &$sink ) {
 		$this->sink =& $sink;
@@ -240,7 +240,7 @@ class WikiExporter {
 	 * Not called by default (depends on $this->list_authors)
 	 * Can be set by Special:Export when not exporting whole history
 	 *
-	 * @param array $cond
+	 * @param string $cond
 	 */
 	protected function do_list_authors( $cond ) {
 		$this->author_list = "<contributors>";
diff --git a/includes/import/WikiImporter.php b/includes/import/WikiImporter.php
index 00bb61f7b28..68f5b9b8bfc 100644
--- a/includes/import/WikiImporter.php
+++ b/includes/import/WikiImporter.php
@@ -466,7 +466,7 @@ class WikiImporter {
 
 	/**
 	 * Notify the callback function when a new "<page>" is reached.
-	 * @param Title $title
+	 * @param array $title
 	 */
 	function pageCallback( $title ) {
 		if ( isset( $this->mPageCallback ) ) {
diff --git a/includes/import/WikiRevision.php b/includes/import/WikiRevision.php
index cae954215af..e36d6734995 100644
--- a/includes/import/WikiRevision.php
+++ b/includes/import/WikiRevision.php
@@ -352,7 +352,7 @@ class WikiRevision implements ImportableUploadRevision, ImportableOldRevision {
 
 	/**
 	 * @since 1.12.2
-	 * @param array $params
+	 * @param string $params
 	 */
 	public function setParams( $params ) {
 		$this->params = $params;