diff --git a/apps/files_external/lib/Lib/Auth/AuthMechanism.php b/apps/files_external/lib/Lib/Auth/AuthMechanism.php
index 1229fd7f07..b18579163a 100644
--- a/apps/files_external/lib/Lib/Auth/AuthMechanism.php
+++ b/apps/files_external/lib/Lib/Auth/AuthMechanism.php
@@ -80,7 +80,7 @@ class AuthMechanism implements \JsonSerializable {
 
 	/**
 	 * @param string $scheme
-	 * @return self
+	 * @return $this
 	 */
 	public function setScheme($scheme) {
 		$this->scheme = $scheme;
diff --git a/apps/files_external/lib/Lib/FrontendDefinitionTrait.php b/apps/files_external/lib/Lib/FrontendDefinitionTrait.php
index ae4b8ec4c3..03b39927d9 100644
--- a/apps/files_external/lib/Lib/FrontendDefinitionTrait.php
+++ b/apps/files_external/lib/Lib/FrontendDefinitionTrait.php
@@ -49,7 +49,7 @@ trait FrontendDefinitionTrait {
 
 	/**
 	 * @param string $text
-	 * @return self
+	 * @return $this
 	 */
 	public function setText($text) {
 		$this->text = $text;
diff --git a/apps/files_external/lib/Lib/IdentifierTrait.php b/apps/files_external/lib/Lib/IdentifierTrait.php
index 84e8c1a81e..38f2d4cd33 100644
--- a/apps/files_external/lib/Lib/IdentifierTrait.php
+++ b/apps/files_external/lib/Lib/IdentifierTrait.php
@@ -46,7 +46,7 @@ trait IdentifierTrait {
 
 	/**
 	 * @param string $identifier
-	 * @return self
+	 * @return $this
 	 */
 	public function setIdentifier($identifier) {
 		$this->identifier = $identifier;