diff --git a/lib/tcpdf/include/barcodes/qrcode.php b/lib/tcpdf/include/barcodes/qrcode.php
index 2e7f2f57681..b1b9aae5f5b 100644
--- a/lib/tcpdf/include/barcodes/qrcode.php
+++ b/lib/tcpdf/include/barcodes/qrcode.php
@@ -884,14 +884,14 @@ class QRcode {
 	protected function getCode() {
 		if ($this->count < $this->dataLength) {
 			$row = $this->count % $this->blocks;
-			$col = $this->count / $this->blocks;
+			$col = (int)($this->count / $this->blocks);
 			if ($col >= $this->rsblocks[0]['dataLength']) {
 				$row += $this->b1;
 			}
 			$ret = $this->rsblocks[$row]['data'][$col];
 		} elseif ($this->count < $this->dataLength + $this->eccLength) {
 			$row = ($this->count - $this->dataLength) % $this->blocks;
-			$col = ($this->count - $this->dataLength) / $this->blocks;
+			$col = (int)(($this->count - $this->dataLength) / $this->blocks);
 			$ret = $this->rsblocks[$row]['ecc'][$col];
 		} else {
 			return 0;
diff --git a/lib/tcpdf/readme_moodle.txt b/lib/tcpdf/readme_moodle.txt
index 7a9bb1e1936..23832673775 100644
--- a/lib/tcpdf/readme_moodle.txt
+++ b/lib/tcpdf/readme_moodle.txt
@@ -6,6 +6,8 @@ Description of TCPDF library import
 * remove all fonts that were not already present
 * visit http://127.0.0.1/lib/tests/other/pdflibtestpage.php and view the pdf
 * modify getTCPDFProducer lib/tcpdf/include/tcpdf_static.php to remove the version number
+* Check the status of https://github.com/tecnickcom/TCPDF/pull/548 , apply if it is still
+  not included or delete this entry
 
 Important
 ---------