diff --git a/packages/coreutils/tests/tails-c-flag.sh b/packages/coreutils/tests/tails-c-flag.sh
index 1993d1a82..2c06c33eb 100644
--- a/packages/coreutils/tests/tails-c-flag.sh
+++ b/packages/coreutils/tests/tails-c-flag.sh
@@ -1,3 +1,4 @@
+# https://github.com/termux/termux-app/issues/232
 set -e -u
 
 RESULT=$(echo -n 123456 | tail -c 3)