diff --git a/dev-java/zxing-javase/files/3.5.1-test-available-formats.patch b/dev-java/zxing-javase/files/3.5.1-test-available-formats.patch
index aa4101749419c..62e154f0dad43 100644
--- a/dev-java/zxing-javase/files/3.5.1-test-available-formats.patch
+++ b/dev-java/zxing-javase/files/3.5.1-test-available-formats.patch
@@ -1,3 +1,5 @@
+https://github.com/zxing/zxing/pull/1668
+https://bugs.gentoo.org/910497
 --- a/src/test/java/com/google/zxing/client/j2se/MatrixToImageWriterTestCase.java
 +++ b/src/test/java/com/google/zxing/client/j2se/MatrixToImageWriterTestCase.java
 @@ -17,7 +17,9 @@