diff --git a/include/tcpdf_fonts.php b/include/tcpdf_fonts.php
index a71c84b7..f4518d9e 100644
--- a/include/tcpdf_fonts.php
+++ b/include/tcpdf_fonts.php
@@ -1780,9 +1780,9 @@ public static function arrUTF8ToUTF16BE($unicode, $setbom=false) {
 	 */
 	public static function UTF8ArrayToUniArray($ta, $isunicode=true) {
 		if ($isunicode) {
-			return array_map(get_called_class().'::unichrUnicode', $ta);
+			return array_map(static::class.'::unichrUnicode', $ta);
 		}
-		return array_map(get_called_class().'::unichrASCII', $ta);
+		return array_map(static::class.'::unichrASCII', $ta);
 	}
 
 	/**
@@ -2002,7 +2002,7 @@ public static function UTF8StringToArray($str, $isunicode, &$currentfont) {
 		if ($isunicode) {
 			// requires PCRE unicode support turned on
 			$chars = TCPDF_STATIC::pregSplit('//','u', $str, -1, PREG_SPLIT_NO_EMPTY);
-			$carr = array_map(get_called_class().'::uniord', $chars);
+			$carr = array_map(static::class.'::uniord', $chars);
 		} else {
 			$chars = str_split($str);
 			$carr = array_map('ord', $chars);