diff --git a/.phan/config.php b/.phan/config.php
index ccd457662..3e247d61a 100644
--- a/.phan/config.php
+++ b/.phan/config.php
@@ -55,5 +55,6 @@ return [
 	],
 	'suppress_issue_types' => [
 		'PhanAccessMethodInternal',
+		'PhanAccessOverridesFinalConstant',
 	],
 ];
diff --git a/src/Data/QRDataModeInterface.php b/src/Data/QRDataModeInterface.php
index 036481f76..518159206 100644
--- a/src/Data/QRDataModeInterface.php
+++ b/src/Data/QRDataModeInterface.php
@@ -20,7 +20,11 @@ interface QRDataModeInterface{
 	/**
 	 * the current data mode: Number, Alphanum, Kanji, Hanzi, Byte, ECI
 	 *
+	 * tbh I hate this constant here, but it's part of the interface, so I can't just declare it in the abstract class.
+	 * phan will complain about a PhanAccessOverridesFinalConstant.
+	 *
 	 * @var int
+	 * @see \chillerlan\QRCode\Common\Mode
 	 */
 	public const DATAMODE = -1;