diff --git a/packages/m4/src-output.c.patch b/packages/m4/src-output.c.patch
index cf56d9f7e..aa26642a0 100644
--- a/packages/m4/src-output.c.patch
+++ b/packages/m4/src-output.c.patch
@@ -1,3 +1,5 @@
+See https://github.com/termux/termux-packages/issues/9056.
+
 --- a/src/output.c
 +++ b/src/output.c
 @@ -423,8 +423,12 @@