diff --git a/src/wp-includes/ID3/getid3.php b/src/wp-includes/ID3/getid3.php
index a6260f0689..cc238253d5 100644
--- a/src/wp-includes/ID3/getid3.php
+++ b/src/wp-includes/ID3/getid3.php
@@ -250,7 +250,7 @@ class getID3
 	 */
 	protected $startup_warning = '';
 
-	const VERSION           = '1.9.19-201912131005';
+	const VERSION           = '1.9.19-201912211559';
 	const FREAD_BUFFER_SIZE = 32768;
 
 	const ATTACHMENTS_NONE   = false;
diff --git a/src/wp-includes/ID3/module.audio.mp3.php b/src/wp-includes/ID3/module.audio.mp3.php
index 192317467c..0b8a351169 100644
--- a/src/wp-includes/ID3/module.audio.mp3.php
+++ b/src/wp-includes/ID3/module.audio.mp3.php
@@ -1788,7 +1788,7 @@ class getid3_mp3 extends getid3_handler
 	 * @return bool
 	 */
 	public static function MPEGaudioHeaderValid($rawarray, $echoerrors=false, $allowBitrate15=false) {
-		if (($rawarray['synch'] & 0x0FFE) != 0x0FFE) {
+		if (!isset($rawarray['synch']) || ($rawarray['synch'] & 0x0FFE) != 0x0FFE) {
 			return false;
 		}