diff --git a/dev-libs/ntl/metadata.xml b/dev-libs/ntl/metadata.xml
index 41060691e8184..495cab106d337 100644
--- a/dev-libs/ntl/metadata.xml
+++ b/dev-libs/ntl/metadata.xml
@@ -11,4 +11,7 @@
 		integers, and for vectors, matrices, and polynomials over the
 		integers and over finite fields.
 	</longdescription>
+	<upstream>
+		<remote-id type="github">libntl/ntl</remote-id>
+	</upstream>
 </pkgmetadata>