diff --git a/package/bison/bison.hash b/package/bison/bison.hash
index 16913f28b0..2c3320852f 100644
--- a/package/bison/bison.hash
+++ b/package/bison/bison.hash
@@ -1,2 +1,4 @@
 # Locally calculated after checking pgp signature
 sha256	a72428c7917bdf9fa93cb8181c971b6e22834125848cf1d03ce10b1bb0716fe1	bison-3.0.4.tar.xz
+# License files, locally calculated
+sha256	8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903	COPYING