diff --git a/util/crossgcc/sum/gmp-6.0.0a.tar.bz2.cksum b/util/crossgcc/sum/gmp-6.0.0a.tar.bz2.cksum
new file mode 100644
index 0000000..67d60bf
--- /dev/null
+++ b/util/crossgcc/sum/gmp-6.0.0a.tar.bz2.cksum
@@ -0,0 +1 @@
+360802e3541a3da08ab4b55268c80f799939fddc  tarballs/gmp-6.0.0a.tar.bz2