diff --git a/lib/private/Archive/Archive.php b/lib/private/Archive/Archive.php
index 633e5e8ab0..20d56e50e7 100644
--- a/lib/private/Archive/Archive.php
+++ b/lib/private/Archive/Archive.php
@@ -113,7 +113,7 @@ abstract class Archive {
 	 * get a file handler
 	 * @param string $path
 	 * @param string $mode
-	 * @return resource
+	 * @return bool|resource
 	 */
 	abstract public function getStream($path, $mode);
 	/**
diff --git a/lib/private/Archive/TAR.php b/lib/private/Archive/TAR.php
index a9dd28b389..f68813752c 100644
--- a/lib/private/Archive/TAR.php
+++ b/lib/private/Archive/TAR.php
@@ -339,7 +339,7 @@ class TAR extends Archive {
 	 *
 	 * @param string $path
 	 * @param string $mode
-	 * @return resource
+	 * @return bool|resource
 	 */
 	public function getStream($path, $mode) {
 		if (strrpos($path, '.') !== false) {
diff --git a/lib/private/Archive/ZIP.php b/lib/private/Archive/ZIP.php
index fd34f4d4ce..96894bac6e 100644
--- a/lib/private/Archive/ZIP.php
+++ b/lib/private/Archive/ZIP.php
@@ -187,7 +187,7 @@ class ZIP extends Archive {
 	 * get a file handler
 	 * @param string $path
 	 * @param string $mode
-	 * @return resource
+	 * @return bool|resource
 	 */
 	public function getStream($path, $mode) {
 		if ($mode == 'r' or $mode == 'rb') {