diff --git a/metadata/rules/gorule-0000058.md b/metadata/rules/gorule-0000058.md
index 6d4e36fb..ba93286a 100644
--- a/metadata/rules/gorule-0000058.md
+++ b/metadata/rules/gorule-0000058.md
@@ -8,7 +8,7 @@ status: proposed
 tags: [context-import]
 contact: "go-quality@lists.stanford.edu"
 ---
-Rules are in the `extensions-constraints.yaml` file. This is
+Rules are in the `extensions-constraints.yaml` file (https://github.com/geneontology/go-site/blob/master/metadata/extensions-constraints.yaml). This is
 a list of allowed extension Relation, Filler (the ID inside the parentheses), and
 the acceptable GO Term roots used with this relation. A cardinality constraint may also be
 applied.