diff --git a/lib/spack/docs/chain.rst b/lib/spack/docs/chain.rst
index e4a275df66..37414a9aa6 100644
--- a/lib/spack/docs/chain.rst
+++ b/lib/spack/docs/chain.rst
@@ -5,9 +5,9 @@
 
 .. chain:
 
-============================
-Chaining Spack Installations
-============================
+=============================================
+Chaining Spack Installations (upstreams.yaml)
+=============================================
 
 You can point your Spack installation to another installation to use any
 packages that are installed there. To register the other Spack instance,