diff --git a/dev-lang/mercury-extras/metadata.xml b/dev-lang/mercury-extras/metadata.xml
index d6a4b0b729f8d..1736dbb41e2a9 100644
--- a/dev-lang/mercury-extras/metadata.xml
+++ b/dev-lang/mercury-extras/metadata.xml
@@ -5,4 +5,7 @@
 <use>
   <flag name="tommath">Enable support for tommath library</flag>
 </use>
+<upstream>
+  <remote-id type="github">Mercury-Language/mercury</remote-id>
+</upstream>
 </pkgmetadata>