diff --git a/util/crossgcc/sum/gmp-6.1.0.tar.bz2.cksum b/util/crossgcc/sum/gmp-6.1.0.tar.bz2.cksum
new file mode 100644
index 0000000..06db257
--- /dev/null
+++ b/util/crossgcc/sum/gmp-6.1.0.tar.bz2.cksum
@@ -0,0 +1 @@
+db38c7b67f8eea9f2e5b8a48d219165b2fdab11f  tarballs/gmp-6.1.0.tar.bz2