diff --git a/package/gsl/gsl.hash b/package/gsl/gsl.hash
new file mode 100644
index 0000000000..bc33e4e2d1
--- /dev/null
+++ b/package/gsl/gsl.hash
@@ -0,0 +1,2 @@
+# Locally calculated after checking pgp signature
+sha256	73bc2f51b90d2a780e6d266d43e487b3dbd78945dd0b04b14ca5980fe28d2f53	gsl-1.16.tar.gz